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GURUCHARAN D from THE PSBB MILLENNIUM SCHOOL , GERUGAMBAKKAM , CHENNAI
Subject :IMO    Class : Class 7

Sakshi can do a piece of work in 20 days. Tanya is 25% more efficient than Sakshi. The number of days taken by Tanya to do the same piece of work is

A15
B16
C18
D25


Answer must be 15 right?

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