A solution of 165 litres contains `80%` of acid and the rest water. How much water must be added to the above solution such that the resulting mixture contains `25%` water ?

Options

A. 11 litres
B. 8 litres
C. 9 litres
D. 10 litres

Answer

A

Explanation

(i) First, find out the quantity of acid and water in the solution.
(ii) Clearly, `20%` of the solution is water. Find the water quantity in 165 liters.
(iii) If x litres of water is added, then total solution is `(165+x)` litres.
(iv) `(33+x):(165+x)=1:4.`