**Boats and Streams Questions for RRB Group-D PDF**

Download Top-10 RRB Group-D Boats and Streams Questions PDF. RRB GROUP-D Boats and Streams questions based on asked questions in previous exam papers very important for the Railway Group-D exam.

Download Boats & Streams Questions for RRB Group-D PDF

Download RRB Group-D Previous Papers PDF

Take a RRB Group-D free mock test

**Question 1: **A boat can cover a distance of 7.2 km downstream and 3.2 km upstream in 2

hours.It can also cover 1.5 km downstream and 0.6 km upstream in 24 minutes. Whatis the

speed of the boat when going downstream (in km/h)?

LATEX

a) Latex 1

b) Latex 2

c) Latex 3

d) Latex 4

**Question 2: **A boat travels 30 km upstream in 10 hours and travels 52 km downstream in 4 hours. What is the time taken to cover 121 km downstream if the speeds of both stream and boat are decreased by 1 km/hr ?

a) 12 hrs

b) 11 hrs

c) 10 hrs

d) 9 hrs

**Question 3: **A boat travels 120 km upstream in 6 hours and travels 90 km downstream with double the speed of upstream. What is the time taken to cover the 90km downstream ?

a) 2 hr 10 min

b) 2 hr 15 min

c) 2 hr 20 min

d) 2 hr 30 min

Take a free mock test for RRB Group-D

770 Mocks (cracku Pass) Just Rs.199

**Question 4: **A boat at anchor is racked by waves whose consecutive crests are 125 m apart. The velocity of the wave of the moving crests is $ 25ms^{-1} $, What is the frequency of the rocking of the boat?

a) 0.20 (Hz)

b) 625 (Hz)

c) 250 (Hz)

d) 100 (Hz)

**Question 5: **A man can row a boat at 10 kmph in still water. If the speed of the stream is 6 kmph, the time taken to row a distance of 80 km down the stream is :

a) 8 hours

b) 5 hours

c) 10 hours

d) 20 hours

**Question 6: **Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. man rows to a place at a distance of 10.5 km and comes back to the starting point. The total time taken by him is :

a) 1.6 hours

b) 1.8 hours

c) 2.0 hours

d) 2.4 hours

d) Rs. 4500

RRB Group D previous year papers

**Instructions**

**Question 7: **A boat takes 4 hours to travel same distance ‘x’ upstream and downstream.If the speed of the boat is 4 km/hr and stream is 2 km/hr then find the value of x ?

a) 6 km

b) 8 km

c) 4 km

d) 10 km

**Instructions**

**Question 8: **A boat takes 10 hours to travel same distance ‘x’ upstream and downstream.If the speed of the boat is 10 km/hr and stream is 6 km/hr then find the value of x ?

a) 24 km

b) 28 km

c) 30 km

d) 32 km

RRB Group-D Important Questions (download PDF)

**Question 9: **A boat goes 2 km upstream and 3 km downstream in 45 minutes while it goes 3 km upstream and 9 km downstream in 90 minutes. Whatis the speed (in km/hr) of boat when going down stream?

a) 9

b) 10.5

c) 12

d) 9.5

**Question 10: **The speed of a boat in still water is 9 km/hr and the speed of stream is 3 km/hr. The difference between the upstream speed and downstream speed will be:

a) 6 km/hr

b) 5 km/hr

c) 3.5 km/hr

d) 7.5 km/hr

General Science Notes for RRB Exams (PDF)

**Answers & Solutions:**

**1) Answer (B)**

**2) Answer (B)**

let the speed of the boat be ‘b’ and stream be ‘s’.

30/(b-s) =10

b-s=3

52/(b+s) =4

b+s=13

b-s=3

2b=16

b=8 km/hr

s=5 km/hr

Each is decreased by 1 km/hr so

b=7 km/hr

s=4 km/hr

Time taken for 121 km downstream=121/11

=11 hrs

**3) Answer (B)**

let the speed of the boat be ‘b’ and stream be ‘s’.

120/(b-s) =6

b-s=20

Given b+s=2(b-s)

b+s=2b-2s

3s=b

3s-s=20

2s=20

s=10

b=30

Time taken for 90 km downstream=90/40

=2.25 hrs

**4) Answer (A)**

**5) Answer (B)**

**6) Answer (D)**

**7) Answer (A)**

Upstream speed =4-2=2 km/hr

Downstream speed=4+2=6 km/hr

Therefore we have $\frac{x}{6}+\frac{x}{2}$=6

4x/6 =4

x=6 km

**8) Answer (D)**

Upstream speed =10-6=4 km/hr

Downstream speed=10+6=16 km/hr

Therefore we have $\frac{x}{16}+\frac{x}{4}$=10

5x/16 =10

x=32

**9) Answer (C)**

**10) Answer (A)**

Speed in upstream=9-3 =6 km/hr

Speed in downstream=9+3=12 km/hr

Difference=6 km/hr

DOWNLOAD APP FOR RRB FREE MOCKS

We hope this Boats and Streams Questions PDF for RRB Group-D Exam will be highly useful for your preparation.