** 9) A vessel is full of mixture of spirit and water in which there is 18% spirit, 8 litres are drawn off and the vessel is filled up with water. If he spirit is now 15% the quantity in the water is:**

(A) 30 litres

(B) 48 litres

(C) 35 litres

(D) 45 litres

** 10) Two vessels contain milk and water mixed respectively in the ratio 3:1 and 5:3. Find the ratio in which these are to be mixed to get a nex mixture in the ratio of milk and water 2:1.**

(A) 2 : 1

(B) 2 : 3

(C) 2 : 5

(D) 1 : 2