Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 26 - 31 of 104

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Question number: 26

» Surface Area and Volumes

MCQ▾

Question

The ratio between the perimeter and breadth of rectangle is 6:1 . If the area of the rectangle is 116 sq. cm. then length of the rectangle is ________

Choices

Choice (4) Response

a.

154cm

b.

124cm

c.

174cm

d.

114cm

Question number: 27

» Surface Area and Volumes

MCQ▾

Question

The volume of a sphere is 8821×353cm3 the curved surface of its sphere is ________

Choices

Choice (4) Response

a.

12400cm2

b.

16400cm2

c.

15400cm2

d.

18400cm2

Question number: 28

» Surface Area and Volumes

MCQ▾

Question

The radii of two cones are in ration 3: 1, their volumes are equal. Find the ratio of their heights.

Choices

Choice (4) Response

a.

1:3

b.

1:9

c.

1:2

d.

1:5

Question number: 29

» Surface Area and Volumes

MCQ▾

Question

A solid consists of a circular cylinder with an exact fitting right circular cone placed on the top. The height of a the cone is h. If the total volume of the solid is three times the volume of the cone, then the height of the cylinder is ________

Choices

Choice (4) Response

a.

3h2

b.

2h

c.

4h

d.

2h3

Question number: 30

» Surface Area and Volumes

MCQ▾

Question

The area of rhombus is 36cm2 and one of its diagonals is 8 cm. Its perimeter is ________

Choices

Choice (4) Response

a.

153cm

b.

4145cm

c.

2145cm

d.

140cm

Question number: 31

» Surface Area and Volumes

MCQ▾

Question

216 plastic balls each of radius r are melted together to from one big sphere of radius R. then the ratio of surface area of the big sphere to that of a ball is ________

Choices

Choice (4) Response

a.

36

b.

27

c.

9

d.

3

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