# Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 29 - 33 of 104

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## 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

## Question number: 33

» Surface Area and Volumes

MCQ▾

### Question

The area of a square and a rectangle are equal. The side of square is 12 cm and the length of rectangle is 16 cm. the perimeter of the rectangle is ________

### Choices

Choice (4) Response

a.

25 cm

b.

50 cm

c.

75 cm

d.

144 cm

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