Mensuration Questions for RRB NTPC Set – 2 PDF
Download RRB NTPC Mensuration Questions and Answers set – 2 PDF. Top 10 RRB NTPC Mensuration questions based on asked questions in previous exam papers very important for the Railway NTPC exam.
Download Mensuration Questions for RRB NTPC Set – 2 PDF
Take a free mock test for RRB NTPC
Download RRB NTPC Previous Papers PDF
Question 1: A hemi sphere of radius of 7 cm is surmounted on a cylinder of same radius and height 7 cm, then find it’s curved surface area ( in sq.cm) ?
a)Â 616
b)Â 620
c)Â 600
d)Â 626
Question 2:Â Find the area of trapezium PQRS, PQ=8 cm, RS=4 cm & height of trapezium is 6 cm ?
a)Â 20 sq.cm
b)Â 24 sq.cm
c)Â 28 sq.cm
d)Â 36 sq.cm
Question 3:Â Find the ratio of the volumes of a cylinder of height 4cm, radius 6cm and a cone of height 6cm and radius 4cm ?
a)Â 3:1
b)Â 9:2
c)Â 18:2
d)Â 9:4
RRB NTPC Previous Papers [Download PDF]
Question 4:Â Find the perimeter of a rectangle whose length is 9 cm and breadth is equal to the side of a square of area 36 sq.cm ?
a)Â 28 cm
b)Â 30Â cm
c)Â 32Â cm
d)Â 34Â cm
Question 5:Â Find the area of trapezium ABCD, AB=7 cm, CD=5 cm & height of trapezium is 4 cm ? It is known that AB is parallel to CD
a)Â 20 sq.cm
b)Â 24 sq.cm
c)Â 28 sq.cm
d)Â 32 sq.cm
Question 6:Â Find the no.of cubes of side 2cm, that can be extracted from a cuboid of length 12 cm, breadth 8 cm and height 10 cm ?
a)Â 100
b)Â 120
c)Â 140
d)Â 160
Question 7: If internal angle of a regular polygon is 120°, then find the number of diagonals in the polygon ?
a)Â 8
b)Â 9
c)Â 10
d)Â 11
Question 8:Â Find the area of a parallelogram of height 5cm and having base equal to 8cm ?
a)Â 20 sq.cm
b)Â 40 sq.cm
c)Â 60 sq.cm
d)Â 80 sq.cm
Download General Science Notes PDF
Question 9: Find the area of a sector of a circle of radius 7cm, with central angle 51° (approx) ?
a)Â 11 sq.cm
b)Â 14 sq.cm
c)Â 22 sq.cm
d)Â 26 sq.cm
Question 10:Â Find the height of a cuboid of total surface area 94 sq cm, if its length and breadth are 4m and 5m respectively ?
a)Â 1 cm
b)Â 2 cm
c)Â 3 cm
d)Â 4 cm
RRB NTPC Previous Papers (Download PDF)
Answers & Solutions:
1) Answer (A)
Total curved surface area = $2\pi rh + 2\pi r^2$ = $2(22/7)(7)(7) + 2(22/7)(7)^2 = 616sq.cm$
So the answer is option A.
2) Answer (D)
Area of trapezium = $\frac{1}{2}$(sum of parallel sides)$h$ = $\frac{1}{2}(8+4)(6) = 36$sq.cm
So the answer is option D.
3) Answer (B)
Vol.of cylinder : Vol.of cone
= $\pi r^2 h : \frac{1}{3}\pi r^2 h$
= $\pi (6)^2(4) : \frac{1}{3}\pi (4)^2(6)$
= $18 : 4$
= $9 : 2$
So the answer is option B.
4) Answer (B)
Length of rectangle = 9 cm
Breadth = side of square = √36 = 6 cm
Perimeter = 2(l+b) = 2(9+6) = 30cm
So the answer is option B.
5) Answer (B)
Area of trapezium = $\frac{1}{2}(a+b)h = \frac{1}{2}(7+5)(4) = 24sq.cm$
So the answer is option B.
6) Answer (B)
Volume of cuboid = lbh = 12*8*10 = 960 cm³
Volume of cube = 2³ = 8 cm³
No.of cubes = $\frac{960}{8} = 120$
So the answer is option B.
7) Answer (B)
If internal angle of a regular polygon is 120°, it is regular hexagon,
No.of diagonals of a polygon of n sides = $n(n-3)/2 = 6(6-3)/2 = 6(3)/2 = 9$
So the answer is option B.
8) Answer (B)
Area of parallelogram = base*height = 8*5 = 40 sq.cm
So the answer is option B.
9) Answer (C)
Area of sector = $\frac{x}{360}\times \pi (r)^2$ = $\frac{51}{360}\times \frac{22}{7}(7)^2 \sim 22sq.cm$
So the answer is option C.
10) Answer (C)
Let h be the height, then
2(lb+bh+hl) = 94
2(20+4h+5h) = 94
(20+9h) = 47
9h = 27
h = 3
So the answer is option C.
DOWNLOAD APP FOR RRB FREE MOCKS
We hope this Mensuration Questions set-2 pdf for RRB NTPC Exam will be highly useful for your Preparation