The speed of a boat in still water is 30 km / h. It goes 60 km in the opposite direction of the current of the stream and returns to the starting point in the direction of the current of the stream. In this entire journey, it has taken 4 hours 10 minutes. How much time (in hours) will it take to cover a distance of 136.8 km towards the flow of the water stream?

The speed of a boat in still water is 30 km / h. It goes 60 km in the

1.	The speed of a boat in still water is 30 km / h. It goes 60 km in the opposite direction of the current of the stream and returns to the starting point in the direction of the current of the stream. In this entire journey, it has taken 4 hours 10 minutes. How much time (in hours) will it take to cover a distance of 136.8 km towards the flow of the water stream?
A.	2.4
B.	3.8
C.	4.2
D.	3.2
Answer» C. 4.2