A man purchases milk at Rs 8.5 per litre. He dilutes it with water and sells the mixture at the same price, earning a profit of 11.11%. The amount of water mixed per litre of milk is?
0.111L
The required 11.11% profit can be obtained only by mixing 0.111L of water in 1L of milk.
In this case, amount of milk = 1.111L and the cost would remain for 1L only.
So, the gain would be 0.1111 = 11.11%.