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
Pick one.
A) 4 days  B) 6 days  C) 10 days  D) 16 days  E) 22 days
Ratio of times taken by Sakshi and Tanya = 125 : 100 = 5 : 4.   Suppose Tanya takes x days to do the work.   5 : 4 :: 20 : x x = 4 x 20/5   x = 16 days.   Hence, Tanya takes 16 days to complete the work. answer :16 days
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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