Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 62 - 67 of 104

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Question number: 62

» Surface Area and Volumes

MCQ▾

Question

If the radius of a sphere is doubled, then its volume is increased by________

Choices

Choice (4) Response

a.

800%

b.

700%

c.

100%

d.

200%

Question number: 63

» Surface Area and Volumes

MCQ▾

Question

Volume of a hemisphere is 19404 cubic cm. The total surface area is ________.

Choices

Choice (4) Response

a.

1386 sq. cm

b.

2772 sq. cm

c.

4158 sq. cm

d.

5544 sq. cm

Question number: 64

» Surface Area and Volumes

MCQ▾

Question

A cylindrical rod whose height is 8 times of its radius is melted and recast into spherical balls of same radius. The numbers of balls will be________

Choices

Choice (4) Response

a.

3

b.

6

c.

4

d.

8

Question number: 65

» Surface Area and Volumes

MCQ▾

Question

The area of a quadrilateral, one of whose diagonals is 50 cm long and the perpendiculars from the other two vertices are 14 cm and 21 cm respectively is ________

Choices

Choice (4) Response

a.

875cm2

b.

500cm2

c.

450cm2

d.

400cm2

Question number: 66

» Surface Area and Volumes

MCQ▾

Question

A rectangular park 60 m long and 40 m wide has two concrete crossroads running in the middle of the park and rest of the park has been used as a lawn. The area of the lawn is 2109 sq. m. What is the width of the road?

Choices

Choice (4) Response

a.

3 m

b.

6 m

c.

7 m

d.

2 m

Question number: 67

» Surface Area and Volumes

MCQ▾

Question

The base of a prism is a triangle whose sides arc of lengths 13 cm, 20 cm and 21 cm. if the height of the prism be 9 cm. find the area of total lateral surface, volume of the prism

Choices

Choice (4) Response

a.

1543 c. cm.

b.

1134 c. cm.

c.

1754 c. cm.

d.

1865 c. cm.

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