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

Question: Rahim can do a piece of work in 20 days. Karim is 25% more efficient than Rahim. The number of days taken by Karim to do the same piece of work is:Solution:Ratio of times taken by Rahimi and Rahim= 125 : 100= 5 : 4Suppose Rahim takes x days to do the work5 : 4 :: 20 : x⇒ x=(4×20)/5⇒ x = 16 daysHence, Rahim takes 16 days to complete the work