# Surface Area and Volumes (IMO- Mathematics Olympiad (SOF) Class 9): Questions 16 - 21 of 104

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## Question number: 16

» Surface Area and Volumes

MCQ▾

### Question

A circular park of 20 metre diameter has a circular path just inside the boundary of width 1 metre. The area of path is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 17

» Surface Area and Volumes

MCQ▾

### Question

A covered wooden box has the inner measures as 115 cm, 75 cm, 35 cm and the thickness of wood is 2.5 cm. Then the volume of the wood is________

### Choices

Choice (4) Response

a.

80, 000 cu. Cm

b.

82, 125 cu. Cm

c.

85, 000 cu. Cm

d.

84, 000 cu. Cm

## Question number: 18

» Surface Area and Volumes

MCQ▾

### Question

A cylindrical vessel 80 cm in diameter is partially filled with water. A sphere, 80 cm in diameter is gently dropped into the vessel. To what further height will water rise in the cylinder?

### Choices

Choice (4) Response

a.

30.33 cm

b.

53.33 cm

c.

15.33 cm

d.

40.33 cm

## Question number: 19

» Surface Area and Volumes

MCQ▾

### Question

A spherical ball of lead, 5 cm in diameter is melted and recast into two spherical balls. The diameter of one of these is 4 cm. The radius of the second ball is________

### Choices

Choice (4) Response

a.

2.51 cm

b.

3.51 cm

c.

2.26 cm

d.

3.94 cm

## Question number: 20

» Surface Area and Volumes

MCQ▾

### Question

A cone and a hemisphere have the same height and same radius of the base. The ratio between the volumes of the cone and the hemisphere is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 21

» Surface Area and Volumes

MCQ▾

### Question

The area of a quadrilateral ABCD, in which, is an equilateral triangles of side 24 cm and is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

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