# Surface Area and Volumes (IMO- Mathematics Olympiad (SOF) Class 9): Questions 27 - 32 of 104

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## Question number: 27

» Surface Area and Volumes

MCQ▾

### Question

The volume of a sphere is the curved surface of its sphere is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## 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.

b.

c.

d.

## 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.

b.

c.

d.

## Question number: 30

» Surface Area and Volumes

MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## 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.

c.

9

d.

## Question number: 32

» Surface Area and Volumes

MCQ▾

### Question

The base and height of the triangle are in the ratio. The area of the triangle is , then height of triangle = ________

### Choices

Choice (4) Response

a.

20 cm

b.

22 cm

c.

18 cm

d.

19 cm

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