Question

How many litres of the mixture of 80 litres bottle, full of 80% concentrated milk, has to be replaced with water to make the resultant 60% concentrated?

Answer 1

64 litre bottle contains 80% concentrated milk to make 60% concentrate 48litre bottle concentrate milk

Answer 2

Let x be the number of litre to be repalced with x litre of water, then

(80-x).8 + 0 = (.6)(80)

Answer 3

Solve for x and get x=20