IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 456 - 461 of 1040

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Question number: 456

» Mensuration

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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.

b.

c.

d.

Question number: 457

» Mensuration

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MCQ▾

Question

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

Choices

Choice (4) Response

a.

7: 9

b.

1: 16

c.

16: 3

d.

1: 9

Question number: 458

» Mensuration

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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.

Constant

c.

One third

d.

Doubled

Question number: 459

» Mensuration

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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 is

Choices

Choice (4) Response

a.

250

b.

247

c.

240

d.

257

Question number: 460

» Mensuration

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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.

11 cm

c.

14 cm

d.

10 cm

Question number: 461

» Mensuration

Edit
MCQ▾

Question

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

Choices

Choice (4) Response

a.

Tripled

b.

Constant

c.

Doubled

d.

Halved