The speed of the stream is 5 km/hr. A Motorboat goes 10 km upstream and back again to the starting point in 50 minutes. What is the speed of the motorboat in still water?
1
20 km/hr
2
25 km/hr
3
28 km/hr
4
30 km/hr
5
None of these
The speed of the stream is 5 km/hr. A Motorboat goes 10 km upstream and back again to the starting point in 50 minutes. What is the speed of the motorboat in still water?
20 km/hr
25 km/hr
28 km/hr
30 km/hr
None of these