{"id":31310,"date":"2019-07-09T19:06:06","date_gmt":"2019-07-09T13:36:06","guid":{"rendered":"https:\/\/cracku.in\/blog\/?p=31310"},"modified":"2019-07-10T16:45:11","modified_gmt":"2019-07-10T11:15:11","slug":"boats-streams-questions-for-rrb-ntpc-pdf","status":"publish","type":"post","link":"https:\/\/cracku.in\/blog\/boats-streams-questions-for-rrb-ntpc-pdf\/","title":{"rendered":"Boats & Streams Questions for RRB NTPC PDF"},"content":{"rendered":"

Boats & Streams Questions for RRB NTPC PDF<\/strong><\/span><\/h2>\n

Download RRB NTPC Boats & Streams Questions and Answers PDF. Top 15 RRB NTPC Boats & Streams questions based on asked questions in previous exam papers very important for the Railway NTPC exam.<\/p>\n

Download Boats & Streams Questions for RRB NTPC PDF<\/a><\/p>\n\n

Take a free mock test for RRB NTPC<\/a><\/p>\n

Download RRB NTPC Previous Papers PDF<\/a><\/p>\n

Question 1:\u00a0<\/b>Find the difference in time taken by the boat travelling at 25 km\/hr to cover 60 while travelling upstream and downstream. Speed of the stream is 5 km\/hr.<\/p>\n

a)\u00a060 minutes<\/p>\n

b)\u00a030 minutes<\/p>\n

c)\u00a090 minutes<\/p>\n

d)\u00a040 minutes<\/p>\n

Question 2:\u00a0<\/b>A man can row 24km\/hr in still water. It takes twice as long to travel any distance upstream as compared to the same distance downstream. Find the speed of the stream.<\/p>\n

a)\u00a012<\/p>\n

b)\u00a010<\/p>\n

c)\u00a08<\/p>\n

d)\u00a06<\/p>\n

Question 3:\u00a0<\/b>Find the speed of the boat if it takes 3 hours to travel a distance of 90km upstream and the speed of the stream is 4 km\/hr?<\/p>\n

a)\u00a030km\/hr<\/p>\n

b)\u00a034km\/hr<\/p>\n

c)\u00a038km\/hr<\/p>\n

d)\u00a042km.hr<\/p>\n

RRB NTPC Previous Papers [Download PDF]<\/a><\/p>\n

FREE RRB NTPC YOUTUBE VIDEOS<\/a><\/p>\n

Question 4:\u00a0<\/b>Find the distance covered by the boat upstream if it travels for 2 hours. Speed of the stream is 7km\/hr and that of the boat is 57km\/hr.<\/p>\n

a)\u00a0128km<\/p>\n

b)\u00a0100km<\/p>\n

c)\u00a0110km<\/p>\n

d)\u00a0120km<\/p>\n

Question 5:\u00a0<\/b>A boat travels 60km upstream and comes back in 8 hours. What is the speed of the boat if the speed of the stream is 4 km\/hr?<\/p>\n

a)\u00a016km\/hr<\/p>\n

b)\u00a020km\/hr<\/p>\n

c)\u00a012km\/hr<\/p>\n

d)\u00a018km\/hr<\/p>\n

Question 6:\u00a0<\/b>What is the time taken by a boat to travel 120km upstream and back to the starting point if the speed of the boat is 25km\/hr and the speed of the stream is 5km\/hr.<\/p>\n

a)\u00a08 hrs<\/p>\n

b)\u00a012 hrs<\/p>\n

c)\u00a014 hrs<\/p>\n

d)\u00a010 hrs<\/p>\n

RRB NTPC Free Mock Test<\/a><\/p>\n\n

Question 7:\u00a0<\/b>The rates upstream and downstream of a swimmer are 10 kmph and 13 kmph respectively. The speed of current is<\/p>\n

a)\u00a03 kmph<\/p>\n

b)\u00a01.5 kmph<\/p>\n

c)\u00a011.5 kmph<\/p>\n

d)\u00a0None of these<\/p>\n

Question 8:\u00a0<\/b>A man rows upstream 16km and down stream 28km, taking 5 hour each time, the velocity of the current<\/p>\n

a)\u00a02.4 km\/hr<\/p>\n

b)\u00a01.2 km\/hr<\/p>\n

c)\u00a03.6 km\/hr<\/p>\n

d)\u00a01.8 km\/hr<\/p>\n

Question 9:\u00a0<\/b>A boat goes at a speed of 30 kmph in still water. What time does it take to travel 50 kms upstream and then 70 kms downstream in water of speed 5 kmph?<\/p>\n

a)\u00a02 hours<\/p>\n

b)\u00a04 hours<\/p>\n

c)\u00a06 hours<\/p>\n

d)\u00a08 hours<\/p>\n

Question 10:\u00a0<\/b>A boat can travel 27 km in one hour in still water and travels the same distance against the stream in 90 minutes. How much time will the boat take to travel 90 km in the direction of the stream?<\/p>\n

a)\u00a04 hours<\/p>\n

b)\u00a04.25 hours<\/p>\n

c)\u00a02.5 hours<\/p>\n

d)\u00a03.5 hours<\/p>\n

Download General Science Notes PDF<\/a><\/p>\n\n

Question 11:\u00a0<\/b>Speed of a boat upstream is 3kmph and while running downstream it has travelled 49km in 7hrs.Find the speed of the river ?<\/p>\n

a)\u00a02kmph<\/p>\n

b)\u00a03kmph<\/p>\n

c)\u00a05kmph<\/p>\n

d)\u00a07kmph<\/p>\n

Question 12:\u00a0<\/b>Speed of a boat during upstream is 3kmph and during downstream, it travelled 49km in 7hrs.Find the speed of the boat in still water ?<\/p>\n

a)\u00a02kmph<\/p>\n

b)\u00a03kmph<\/p>\n

c)\u00a05kmph<\/p>\n

d)\u00a07kmph<\/p>\n

Daily Free RRB Online Tests for RRB Exams<\/a><\/p>\n

RRB NTPC Free Mock Test<\/a><\/p>\n

Question 13:\u00a0<\/b>Find the speed of a boat in still water, which took 2 hrs to travel a distance during upstream and 6 hrs to travel the same distance during downstream, if speed of stream is 2 kmph ?<\/p>\n

a)\u00a02 kmph<\/p>\n

b)\u00a03 kmph<\/p>\n

c)\u00a04 kmph<\/p>\n

d)\u00a05 kmph<\/p>\n

Question 14:\u00a0<\/b>Find the speed of the river, if a boat took 12 hrs to travel upstream and 4 hrs to travel downstream. Assume speed of the boat in still water is 4kmph ?<\/p>\n

a)\u00a00.5 kmph<\/p>\n

b)\u00a01 kmph<\/p>\n

c)\u00a01.5 kmph<\/p>\n

d)\u00a02 kmph<\/p>\n

Question 15:\u00a0<\/b>Find the distance covered by a boat in 30 mins during downstream, if its speed in still water is 7 kmph and speed of the stream is 5 kmph ?<\/p>\n

a)\u00a06 km<\/p>\n

b)\u00a07 km<\/p>\n

c)\u00a08 km<\/p>\n

d)\u00a09 km<\/p>\n

RRB NTPC Previous Papers (Download PDF)<\/a><\/p>\n\n

Answers & Solutions:<\/strong><\/span><\/p>\n

1)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

Speed of the boat upstream = (25-5)km\/hr = 20 km\/hr
\nSpeed of the boat downstream = (25+5)km\/hr = 30 km\/hr
\nDistance = 60 km
\nTime taken upstream = 60\/20 = 3 hours
\nTime taken downstream = 60\/30 = 2 hours
\nDifference in time taken = 3-2 = 1 hour<\/p>\n

2)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

Since it takes twice as long in upstream,
\nNet speed in Upstream = x
\nNet speed in downstream = 2x
\nLet the speed of stream be y
\n24-y = x
\n24+y = 2x
\n24+y = 2(24-y)
\n3y = 24
\ny = 8<\/p>\n

3)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Let the speed of the boat be x.<\/p>\n

Speed of the boat Upstream = x-4<\/p>\n

90\/(x-4) = 3<\/p>\n

x = 34km\/hr<\/p>\n

4)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Speed of the boat upstream = (57-7)km\/hr = 50km\/hr
\nTime = 2 hours
\nDistance = 50*2 = 100km<\/p>\n

5)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

Distance = 60km
\nLet speed of the boat be x
\nSpeed of the boat upstream = (x-4) km\/hr
\nSpeed of the boat downstream = (x+4)km\/hr
\nTotal time = 8 hours
\n$\\frac{60}{x-4} + \\frac{60}{x+4} = 8$
\n$x^2-15x-16 = 0$
\n$x^2-16x+x-16 = 0$
\n(x+1)(x-16) = 0
\nx = -1 or +16<\/p>\n

As speed cannot be negative, x=16km\/hr<\/span><\/p>\n

6)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

Speed of the boat upstream = 25-5 = 20km\/hr
\nSpeed of the boat downstream = 25+5 = 30km\/hr
\nTime take =$\\frac{120}{30}+\\frac{120}{20}$ = 4+6 hrs = 10 hrs<\/p>\n

7)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Let the speed of the current be c<\/p>\n

Speed of the swimmer = s<\/p>\n

s + c = 13 ….. (1)<\/p>\n

s – c = 10 …….(2)<\/p>\n

Subtracting (2) from (1), we get 2c = 3 or c = 1.5<\/p>\n

8)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

Let the man’s speed be m and the speed of current be c<\/p>\n

Time taken in downstream = $ \\frac{28}{m+c}$ = 5<\/p>\n

Time taken in upsteam = $ \\frac{16}{m-c}$ = 5<\/p>\n

Subtracting second equation from first equation, we get 10 c = 12 or c = 1.2<\/p>\n

9)\u00a0Answer\u00a0(B)<\/strong><\/p>\n

The relative speed of the boat in upstream = 30 – 5 = 25 kmph
\nDistance = 50 kms
\nTime = 50 \/ 25 = 2 hours.<\/p>\n

Relative speed in downstream = 30 + 5 = 35 kmph
\nDistance = 70 kms
\nTime = 70\/35 = 2 hours.<\/p>\n

Total time = 2 + 2 = 4 hours.<\/p>\n

10)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

Let \u2018s\u2019 be the speed of the boat and \u2018w\u2019 be the speed of the stream.
\nWe have, s = 27 km\/hr and $\\frac{27}{s-w} = 1.5 $ hour
\nSo s – w = 18 so w = 9 km\/hr
\nWe get, $\\frac{90}{18+9} = 2.5$ hour
\nHence, option C is the right choice.<\/p>\n

11)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

Speed of boat in still water = x say<\/p>\n

Speed of stream = y say<\/p>\n

During upstream, speed = x-y = 3kmph ——-(1)<\/p>\n

During downstream, speed = x+y = 49\/7 = 7 kmph ——-(2)<\/p>\n

On solving (1) & (2)<\/p>\n

x = 5 kmph & y = 2 kmph<\/p>\n

So the answer is option A.<\/p>\n

12)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

Let x, y are the speeds of boat and river.<\/p>\n

Speed during upstream = x-y = 3 ——-(1)<\/p>\n

speed during downstream = x+y = 49\/7 = 7——-(2)<\/p>\n

On solving (1) & (2)<\/p>\n

x = 5 kmph y = 2 kmph<\/p>\n

So the answer is option C.<\/p>\n

13)\u00a0Answer\u00a0(C)<\/strong><\/p>\n

Let x be the speed of the boat in still water,<\/p>\n

During upstream, speed $S_1=x-2$<\/p>\n

During downstream, speed $S_2=x+2$<\/p>\n

$S_1t_1=S_2t_2$<\/p>\n

$(x-2)(6) = (x+2)(2)$<\/p>\n

$6x-12 = 2x+4$<\/p>\n

$4x = 16$<\/p>\n

$x = 4 kmph$<\/p>\n

So the answer is option C.<\/p>\n

14)\u00a0Answer\u00a0(D)<\/strong><\/p>\n

Let x be the speed of the river.<\/p>\n

During upstream, speed = 4-x kmph , time = 12hrs<\/p>\n

During downstream, speed = 4+x kmph, time = 4hrs<\/p>\n

(4-x)(12) = (4+x)(4)<\/p>\n

48-12x = 16+4x<\/p>\n

32 = 16x<\/p>\n

x = 2<\/p>\n

So the answer is option D.<\/p>\n

15)\u00a0Answer\u00a0(A)<\/strong><\/p>\n

Relative speed during downstream = 7+5 = 12 kmph<\/p>\n

Time = 30 mins = 1\/2 hr = 0.5 hrs<\/p>\n

Distance = Speed*Time = 12*0.5 = 6 km<\/p>\n

So the answer is option A.<\/p>\n\n

DOWNLOAD APP FOR RRB FREE MOCKS<\/a><\/p>\n

We hope this Boats & Streams Questions\u00a0 for RRB NTPC Exam will be highly useful for your Preparation.<\/p>\n","protected":false},"excerpt":{"rendered":"

Boats & Streams Questions for RRB NTPC PDF Download RRB NTPC Boats & Streams Questions and Answers PDF. Top 15 RRB NTPC Boats & Streams questions based on asked questions in previous exam papers very important for the Railway NTPC exam. Take a free mock test for RRB NTPC Download RRB NTPC Previous Papers PDF […]<\/p>\n","protected":false},"author":41,"featured_media":31314,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"footnotes":""},"categories":[169,125,31,1603,1601],"tags":[491,1637,1647,1619],"class_list":{"0":"post-31310","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-downloads","8":"category-featured","9":"category-railways","10":"category-rrb-ntpc","11":"category-rrb-ntpc-je","12":"tag-rrb","13":"tag-rrb-exam","14":"tag-rrb-mocks","15":"tag-rrb-ntpc-2019"},"better_featured_image":{"id":31314,"alt_text":"Boats & Streams Questions for RRB NTPC PDF","caption":"Boats & Streams Questions for RRB NTPC PDF","description":"Boats & Streams Questions for RRB NTPC 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