6. 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:
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<=> (4×20/5)
<=> 16 days.
