# IMO- Mathematics Olympiad Class 8: Questions 432 - 437 of 1029

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## Question number: 432

MCQ▾

### Question

A hoop is resting vertically at staircase as shown in the diagram. AB = 12 cm and BC = 6 cm. The radius of the hoop is________.

### Choices

Choice (4) Response

a.

11 cm

b.

10 cm

c.

15 cm

d.

12 cm

## Question number: 433

MCQ▾

### Question

Find the surface area of a cylinder with diameter of base 5 cm and height 30 cm.

### Choices

Choice (4) Response

a.

505

b.

510

c.

511

d.

610

## Question number: 434

MCQ▾

### Question

Two rectangles ABCD and DBEF are as shown in the figure. The area of rectangle DBEF in square units is________.

### Choices

Choice (4) Response

a.

120

b.

90

c.

160

d.

140

## Question number: 435

MCQ▾

### Question

Two cubes have their volumes in the ratio 1: 8. Find the ratio of their surface areas.

### Choices

Choice (4) Response

a.

1: 9

b.

5: 3

c.

1: 4

d.

7: 9

## Question number: 436

MCQ▾

### Question

A child walked 17 m to cross a rectangular field diagonally. If breadth of field is 8 m, its length is________.

### Choices

Choice (4) Response

a.

12 m

b.

15 m

c.

20 m

d.

11 m

## Question number: 437

MCQ▾

### Question

Three cubes whose edges are 3 cm, 4 cm, and 5 cm respectively are melted without any loss of metal into a single cube. The edge of new cube is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

f Page