In what proportion must water be added to spirit to gain 20% by sellin

1.	In what proportion must water be added to spirit to gain 20% by selling it at the cost price?
A.	2:5
B.	1:5
C.	3:5
D.	4:5
Answer» C. 3:5

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In what proportion must water be added to spirit to gain 20% by selling it at the cost price?

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