# IMO Level 1- Mathematics Olympiad (SOF) Class 8: Questions 465 - 471 of 1042

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## Question 465

### Question

MCQ▾

The radius of the cylinder whose lateral surface area is 520 and height 5 cm, is________.

### Choices

Choice (4)Response

a.

12 cm

b.

14 cm

c.

17 cm

d.

11 cm

## Question 466

### Question

MCQ▾

Surface area of a cube with edge = 1.2 cm is________.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 467

### Question

MCQ▾

Three solid cubes of sides 1 cm, 6 cm and 8 cm are melted to form a new cube. Find the surface area of the cube so formed.

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 468

### Question

MCQ▾

The ratio of areas of two squares, one having triple its diagonals than the other is________.

### Choices

Choice (4)Response

a.

2: 3

b.

2: 9

c.

9: 1

d.

5: 3

## Question 469

### Question

MCQ▾

The ratio of areas of two squares, one having double its diagonals than the other is________.

### Choices

Choice (4)Response

a.

4: 1

b.

9: 1

c.

2: 3

d.

2: 9

## Question 470

### Question

MCQ▾

Three cubes whose edges are 1 cm, 6 cm, and 8 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.

## Question 471

### Question

MCQ▾

What is the ratio of the perimeter of the shaded region to the circumference of the circle?

### Choices

Choice (4)Response

a.

b.

c.

d.