X can do a piece of work in 25 days. Y is 25% more efficient than X. The number of days taken by Y is

X can do a piece of work in 25 days. Y is 25% more efficient than X

1.	X can do a piece of work in 25 days. Y is 25% more efficient than X. The number of days taken by Y is
A.	15 days
B.	20 days
C.	21 days
D.	30 days
Answer» C. 21 days

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X can do a piece of work in 25 days. Y is 25% more efficient than X. The number of days taken by Y is

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