# IMO- Mathematics Olympiad Class 8: Questions 547 - 552 of 1029

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## Question number: 547

MCQ▾

### Question

can do a piece of work in 70 days. He works at it for 7 days and then alone finishes the work in 40 days. The two together could have completed the work in ________.

### Choices

Choice (4) Response

a.

30 days

b.

23.8 days

c.

20.5 days

d.

23 days

## Question number: 548

MCQ▾

### Question

The value of , is________.

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 549

MCQ▾

### Question

Two pipes A and B can fill a tank in 12 and 24 minutes respectively. If both the pipes are used together, then how long will it take to fill the tank?

### Choices

Choice (4) Response

a.

2 minutes

b.

6 minutes

c.

5 minutes

d.

8 minutes

## Question number: 550

MCQ▾

### Question

Which of the following values are equal?

(1) (2) (3) (4)

### Choices

Choice (4) Response

a.

2 and 3

b.

1 and 2

c.

1 and 3

d.

1 and 4

## Question number: 551

MCQ▾

Simplify:

### Choices

Choice (4) Response

a.

b.

1

c.

d.

## Question number: 552

MCQ▾

### Question

Given that and, then the value of is (approximately) ________.

### Choices

Choice (4) Response

a.

4.21

b.

4.00

c.

4.39

d.

4.57

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