Question

A boat travels from City X to City Y upstream

and return from City Y to City X downstream.

If the speed of the boat in still water is 40

km/hr and the speed of the stream is 10 km/hr,

what is the average speed of the round trip?​

Answer 1

HERE IS YOUR ANSWER :

Average speed = (40×2 - 10/2)/2
= (80-5)/2
= 37.5 km/hr.

PLS MARK MY ANSWER THE BRAINLIEST ONE.