Discussion

Explanation:

Let P km/hr be the speed of boat P, and Q km/hr be the speed of boat Q. 

Let s km/hr be the rate of flow of stream. 

We have,

P - s = 80/10 = 8 and P + s = 80/5 = 16

Solving, we get P = 12 and s = 4

Again, Q - s = 60/5 = 12

Thus, s = 4 and Q = 16.

Thus, speed of boat Q in still water is 16 km/hr.

Hence, option (b).

» 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.


© 2024 | All Rights Reserved | Apti4All