Question

The speed of the boat still in water is 15km/hr it needs four more hour to travel 63km against the currnet of the river than it needs to travel dowen the river determine the speed of the currnet of the river

Answer 1

speed of currnet of river=3 km/hr

Explanation:

speed of the boat in still water=15km/hr

speed of the boat in still water for four hour=
`15*4`

=60km/hr

hence speed of currnet of river=63km/hr-60km/hr=3km/hr answer