Question

Q:
Milk and water are in 7:2 ratio in a mixture of 729 litres. How much water shall be mixed in it in order to change this ratio to 7:3?​

Answer 1

Milk: Water=7.2

mixture=729x7/9=567 litre

water=729x2/9=162 litre

Let the new mixture after

adding water-X litre

then Xx7/10=567

x = 5 6 7 x 10/7=810

added water=810-729=81 litre