# Surface Area and Volumes (IMO- Mathematics Olympiad (SOF) Class 9): Questions 69 - 75 of 104

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## Question number: 69

» Surface Area and Volumes

MCQ▾

### Question

Two cubes each of volume are joining end to end. Find the surface area of the resulting cuboid.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 70

» Surface Area and Volumes

MCQ▾

### Question

Two cylinders of same volume have their heights in the ratio 1: 3. Find the ratio of their radii?

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Choice (4) Response

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b.

c.

d.

## Question number: 71

» Surface Area and Volumes

MCQ▾

### Question

A cylindrical vessel 60 cm in diameter is partially filled with water. A sphere, 60 cm in diameter is gently dropped into the vessel. To what further height will water rise in the cylinder?

### Choices

Choice (4) Response

a.

25 cm

b.

15 cm

c.

30 cm

d.

40 cm

## Question number: 72

» Surface Area and Volumes

MCQ▾

### Question

What change in percent is made in the area of a rectangle by decreasing its length and increasing its breadth by ?

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Choice (4) Response

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b.

c.

d.

## Question number: 73

» Surface Area and Volumes

MCQ▾

### Question

The heights of two cones are in the ratio of 3: 8 and their radius in the ratio 5: 3. Then the ratio of their volumes is ________

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Choice (4) Response

a.

b.

c.

d.

## Question number: 74

» 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

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b.

c.

d.

## Question number: 75

» Surface Area and Volumes

MCQ▾

### Question

The largest sphere is cut off from a cube of side 8 cm. the volume of the sphere will be ________

### Choices

Choice (4) Response

a.

b.

c.

d.

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