IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 456 - 461 of 1091

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Question 456

Question MCQ▾

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

Edit

Question 457

Question MCQ▾

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

Edit

Question 458

Question MCQ▾

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

Edit

Question 459

Question MCQ▾

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

Choices

Choice (4)Response

a.

12 cm

b.

11 cm

c.

14 cm

d.

10 cm

Edit

Question 460

Question MCQ▾

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

Edit

Question 461

Question MCQ▾

Between a square of perimeter 36 cm and a circle of circumference 36 cm, which figure has larger area and by how much?

Choices

Choice (4)Response

a.

Square, 22

b.

Circle, 26

c.

Circle, 22

d.

All of the above

Edit