Question

What weight of 2nd mixture must be taken so as to make a third mixture 7 litres in weight wirh 70% milk

Answer 1

Answer:

Explanation:

A mixture contains milk and water in the ratio 2 : 3 and the other contains them in the ratio 3 : 1 respectively. What weight of 2nd mixture must be taken so as to make a third mixture 7 litres in weight with 70% milk?

A) 1 litre

B) 4 litres

C) 6 litres

D) 10 litres

E) 9 litres

Answer & Explanation

C) 6 litres

Explanation:

70/100 = 7/10

Milk in first = 2/(2+3) = 2/5, milk in second = 3/(3+1) = 3/4

By method of allegation:

2/5                                3/4

.                  7/10

3/4 – 7/10               7/10 – 2/5

1/20 : 3/10

1 : 6

So in 3rd mixture, 2nd mixture is [6/(1+6)] * 7 = 6 litres