# Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 68 - 71 of 104

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## Question number: 68

» Surface Area and Volumes

MCQ▾

### Question

A rectangle is divided into five smaller rectangles, as shown in the figure. Four of them have areas, , and as indicated. Then the area of the shaded rectangle is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## 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?

### Choices

Choice (4) Response

a.

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

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