Mensuration (IMO- Mathematics Olympiad Class 8): Questions 23 - 28 of 61

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Question number: 23

» Mensuration

MCQ▾

Question

The dimensions of an open box are 30 cm, 20 cm and 11 cm. Its thickness is 2 cm. If 1 cubic cm of metal used in the box weights 1 gms, find the weight of the box.

Choices

Choice (4) Response

a.

1.99 kg

b.

4.561 kg

c.

1.860 kg

d.

2.856 kg

Question number: 24

» Mensuration

MCQ▾

Question

If the area of a triangle with base a is equal to area of a square of side a, the altitude of the triangle is________.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 25

» Mensuration

MCQ▾

Question

Two cubes have their volumes in the ratio 1: 64. Find the ratio of their surface areas.

Choices

Choice (4) Response

a.

1: 9

b.

16: 3

c.

7: 9

d.

1: 16

Question number: 26

» Mensuration

MCQ▾

Question

The radius of a cylinder is tripled but its lateral surface area is unchanged. Then its height must be________.

Choices

Choice (4) Response

a.

Halved

b.

One third

c.

Doubled

d.

Constant

Question number: 27

» Mensuration

MCQ▾

Question

A cylindrical tower is 7 meters in diameter and 15 meters height. The cost of white washing its curved surface at 75 paisa per Equation is

Choices

Choice (4) Response

a.

257

b.

250

c.

240

d.

247

Question number: 28

» Mensuration

MCQ▾

Question

A hoop is resting vertically at staircase as shown in the diagram. AB = 8 cm and BC = 4 cm. The radius of the hoop is________.

A hoop resting vertically at stair case

A Hoop Resting Vertically at Stair Case

Find out the radius of the hoop that is resting vertically at stair case

Choices

Choice (4) Response

a.

12 cm

b.

10 cm

c.

14 cm

d.

11 cm

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