Discussion

Explanation:

Let the time taken by P alone be 6x days.
∴ Time taken by Q alone will be 3x days and that by R will be 2x days.

Working together the three of them can finish the work in 5 days.

⇒ 15=1P+1Q+1R

⇒ 15=16x+13x+12x

⇒ 15=1+2+36x

⇒ 15=1x

⇒ x = 5

∴ Q alone can complete the work in 3x = 15 days.

Hence, option (c).

» Your doubt will be displayed only after approval.


Doubts


Feedback

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.


© 2023 | All Rights Reserved | Apti4All