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From a cask full of milk, 10 litres are ...

From a cask full of milk, 10 litres are taken out of 50 litre and is filled with water. This was done twice. What is the quantity of milk now left in the cask?

A

20 litres

B

32 litres

C

25 litres

D

30 litres

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The correct Answer is:
B
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