# Surface Area and Volumes (IMO- Mathematics Olympiad Class 9): Questions 19 - 23 of 104

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## 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.

## Question number: 22

» Surface Area and Volumes

MCQ▾

### Question

The parallel sides of a trapezium are 60 cm and 77 cm and non-parallel sides are 26 cm and 26 cm. The approximate area of trapezium is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 23

» Surface Area and Volumes

MCQ▾

### Question

In the given figure, the area of shaded portion is ________

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page