Question

7.A mixture of 70 litres of milk and water contains 10% of water. How much
water must be added to make water 12 1/2 %?
​

Answer 1

Amount of water in the solution=70/100*10

=7 litres

Amount of milk on the solution =70 - 7

= 63 litres

Amount of water required to make the desired solution = 1/2*63

=32 1/2 litres

Therefore amount of water needed to be added

=32 1/2-7 litres

= 25 1/2 litres

Answer 2

here is your perfect answer