A boat covered an upstream distance of 200 km and a downstream distance of 300 km. Time taken by boat to travel upstream distance is equal to the time taken by boat in downstream. The speed of the boat in still water is 5 km/h. Then, find the speed of the stream.
1
1 km/h
2
2 km/h
3
5 km/h
4
7 km/h
5
3 km/h