P is thrice as efficient as Q and R is twice as efficient as P. What is the ratio of the number of days taken by P, Q and R, when they work individually?
Explanation:
Ratio of efficiency of P, Q, R = 3 : 1 : 6
We know the ratio of efficiency is reciprocal to the ratio of time taken to complete a certain work.
∴ Ratio of number of days taken = 1/3 ∶ 1/1 : 1/6 = 2 ∶ 6 ∶ 1.
Hence, option (e).
» Your doubt will be displayed only after approval.
Help us build a Free and Comprehensive Preparation portal for various competitive exams by providing us your valuable feedback about Apti4All and how it can be improved.