# Mensuration Questions for RRB NTPC Set – 2 PDF

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## 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.

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) 616

b) 620

c) 600

d) 626

Question 2: Find the area of trapezium PQRS, PQ=8 cm, RS=4 cm & height of trapezium is 6 cm ?

a) 20 sq.cm

b) 24 sq.cm

c) 28 sq.cm

d) 36 sq.cm

Question 3: Find the ratio of the volumes of a cylinder of height 4cm, radius 6cm and a cone of height 6cm and radius 4cm ?

a) 3:1

b) 9:2

c) 18:2

d) 9:4

Question 4: 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) 28 cm

b) 30 cm

c) 32 cm

d) 34 cm

Question 5: 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) 20 sq.cm

b) 24 sq.cm

c) 28 sq.cm

d) 32 sq.cm

Question 6: 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) 100

b) 120

c) 140

d) 160

Question 7: If internal angle of a regular polygon is 120°, then find the number of diagonals in the polygon ?

a) 8

b) 9

c) 10

d) 11

Question 8: Find the area of a parallelogram of height 5cm and having base equal to 8cm ?

a) 20 sq.cm

b) 40 sq.cm

c) 60 sq.cm

d) 80 sq.cm

Question 9: Find the area of a sector of a circle of radius 7cm, with central angle 51° (approx) ?

a) 11 sq.cm

b) 14 sq.cm

c) 22 sq.cm

d) 26 sq.cm

Question 10: Find the height of a cuboid of total surface area 94 sq cm, if its length and breadth are 4m and 5m respectively ?

a) 1 cm

b) 2 cm

c) 3 cm

d) 4 cm

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.

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.

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.

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.

Area of trapezium = $\frac{1}{2}(a+b)h = \frac{1}{2}(7+5)(4) = 24sq.cm$

So the answer is option 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.

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.

Area of parallelogram = base*height = 8*5 = 40 sq.cm

So the answer is option B.

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.

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.

We hope this Mensuration Questions set-2 pdf  for RRB NTPC Exam will be highly useful for your Preparation