proportion

The value of "a" if a : 300 : : 7 : 5

• 420

• 400

• 350

• 200

8 is the fourth proportional of which of the following?

• 2 : 6 : : 4 : x

• 3 : 4 : : 6 : x

• 5 : 2 : : 10 : x

• 30 : 5 : : 3 : x

If 24 eggs bought for Rs.42 , _______ will be the cost of 144 eggs .

• 200

• 205

• 220

• 252

If 15 men can do a piece of work in 40 days, __________ men can do the same work in 24 days.

• 20

• 25

• 10

• 15

The fourth proportion if 8, 4, 2 is __________

• 0

• 1

• 6

• 8

A ratio equivalent to 3 : 7 is ________________

• 3 : 9;

• 6 : 10

• 9 : 21

• 18 : 49

In 4 : 7 : : 16 : 28, 7 and 16 are called

• extreme terms

• mean terms;

• b mean and c extreme term

• none of these

The first, second and fourth terms of a proportion are 16, 24 and 54 respectively. Then the third term is:

• 36;

• 28

• 48

• 32

A train covers 828 km in 9 hours. __________ distance will it cover in 6 hours.

• 552

• 582

• 590

• 592

Ron earns $ 840 in a week. ____________ will he earn in 36 days.

• 4000

• 4300

• 4320

• 4500