Question

A motor boat whose speed is 18km/h in still water takes 1hour more to go 24km upstream than to return. Find the speed

Answer 1

Let the speed=x km/h
speed=distance/time
upstream=24/18-x
downstream=24/18+x
ATQ
24/(18-x) - 24/(18+x)= 1 .....1 equation.
solve this equation you will get speed=6km/h