Question

A motor boat covers 30 km upstream and 28 km downstream in 7 hours. Also, it covers 21 km upstream and come back in 5 hours. Find the speed of the motor boat in still water and that of the stream.

Answer 1

Answer:

let x be the boat stream and y be the speed of boat u take upstream

$x - 1$

and for downstream

$x + 1$

then A to Q put the value

$30 \div x - 1$

and