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:

A. 15

B. 16

C. 18

D. 25

Answer: Option B

Solution(By Examveda Team)

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
⇒ $$x = {\frac{{4 \times 20}}{5}} $$
⇒ x = 16 days
Hence, Tanya takes 16 days to complete the work