In a pot there is 80 litres water 8 litres water is drained and 8 litres milk is filled This process...........

Quantitative Aptitude (CDS) Mixture and Alligation

In a pot there is 80 litres water, 8-litres water is drained and 8-litres milk is filled. This process is repeated two times more. How much water remains in the pot?

58.32 litres

50 litres

30 litres

40 litres

Explanation:

80 litres water
8 litre drained water,8 litres milk filled
8 litres water drained, 8 litres milk filled
8 litres water drained, 8 litres milk filled
Let total x litre and y litre drained n times
X(x-y/x ) ^n
80(80-8/80) ^3
80×9^3 /1000
=8×729/100
=58.32