(Q1) Mathematics » Speed Time and Distance
A motorboat whose speed is 20 km/h in still water takes 30 minutes more to go 24 km upstream than to cover the same distance downstream. If the speed of the boat in still water is increased by 2 km/h, then how much time will it take to go 39 km downstream and 30 km upstream?
3h 40m
2h 40m
2h 50m
3h 10m