You can put this solution on YOUR website! A motor boat travels at the rate of 50kph down the river.
If the current of the river is 5kph, how far can it travel up the river in 2 hours?
Find the speed of the boat in still water
50 - 5 = 45 mph
Find the distance (d) up river in two hrs
d = 2(45-5)
d = 80 km