8. In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is:
A. 30 litres
B. 60 litres
C. 20 litres
D. 40 litres
8. In a mixture 60 litres, the ratio of milk and water 2 : 1. If this ratio is to be 1 : 2, then the quanity of water to be further added is:
A. 30 litres
B. 60 litres
C. 20 litres
D. 40 litres