Mensuration for class 9

Table of Contents

Mensuration for class 9- MCQ’s

Mensuration is the branch of geometry that deals with the measurement of area, length, or volume in 2D and 3D shapes. The 2D shapes can be drawn in a plane like square, rectangle, triangle, circle, etc.

Mensuration includes computation using mathematical formulas and algebraic equation.

Right Prism: A prism whose bases, are perpendicular to the lateral edges is called a right prism. The base of the prism can be a polygon.

In a right prism,

Lateral surface area = perimeter of base * Height
Total surface area = Lateral surface area + 2 (Area of base)
Volume = Area of base * Height

Cuboid: If l be the length and b be breadth of the base and h be height, then

Lateral surface area = 2 (l +b)h sq units

Total surface area = 2(l + b)h + 2lb = 2(lb + bh+ lh) sq units

Volume = lbh cu units

MCQs for Mensuration for class 9

The ratio of radii of two sphere is 3:2. Then, the ratio of their TSA is…..
(a)3:4
(b) 4:3
(c) 3:1
(d) 9:4

2.A cone and a cylinder have equal radii and equal heights, Then the ratio of their volume is…
(a)1:2
(b)1:3
(c)3:1
(d) 1:4

3. The volume of sphere is 4.5 cm³. Then , its diameter is…. Cm
(a) 1.5
(b) 4.5
(c) 3
(d) 6

4.The ratio of radii of two cylinder is 3:4 and the ratio of their height is 4:5 then the ratio of their volume is..(a)20:4
(b)20:1
(c) 20:9
(d) 9:20

5.Volume of hemisphere with radius 1.2 cm is____cm³
(a)1.152

(b) 0.96

(d) 3.456

6.The radius of the base of a cylinder is 7cm & height 1 m . Then, the area of its base is     ……cm²
(a) 154
(b)1540
(c)150
(d) none

(a)2:9
(b)9:2
(c)1:9
(d)5:9

9. The radius and height of a cone are each increased by 20%, then the volume of the cone is increased by

(a) 20%
(b) 40%
(c) 60%
(d) 72.8%

10. Find volume of cube whose surface area is 5400 cm².(in cm³)

(a) 9000
(b)90000
(c) 2700
(d) 27000

Answer key :=Mensuration for class 9

1	2	3	4	5	6	7	8	9	10
D	B	C	D	A	D	a	b	d	d

ALSO VISIT: ARCHIMEDES PRINCIPLE

ALSO WATCH: NUMBER SYSTEM

Mensuration for class 9 – MCQ’s