A Vendor has purchased some milk at Rs $$x$$ per litre and mixed water so that the ratio of milk and water is 3 : 2. He then added 10 litres of water in the container and sold the mixture at the rate of Rs. $$x$$ per litre. If he made a profit of 100%, the amount of milk in the container (in litres) is

A

20

B

30

C

40

D

50