Question

In a 140 litres of mixture of milk and water, the ratio of milk to water is 5 : 2. If 28 litres mixture is taken out and same amount of water is added to the mixture. If this process is repeated for two times, then what will be quantity of milk in final mixture ? A. 81.48 litres B. 64.84 litres C. 51.2 litres D. 51.68 litres E. 65.68 litres​

Answer 1

Answer:

In a 140 litres of mixture of milk and water, percentage of water is only 30%. The milkman gave 20 litres of this mixture to a customer. Then he added equal quantities of pure milk and water to the remaining mixture. As a result the respective ratio of milk and water in the mixture became 2 : 1. What was the quantity of milk added ?(in litres)

A) 12

B) 16

C) 18

D) 8

Correct Answer:

A) 12

Description for Correct answer:

In 120 1itres of mixture.

Milk =120×70100=84litres

Water =120×30100=36litres

Let x litres of milk and x litres of water are mixed.

According to the question,

84+x36+x=21

=> 72 + 2x = 84 + x

=> x=84−72=12litres

Step-by-step explanation: