A boatman goes 2 km against the current of the stream in 1 hr and goes 1 km along the current in 10 min. How long will he take to go 5 km in stationary water?

A boatman goes 2 km against the current of the stream in 1 hr and goes

1.	A boatman goes 2 km against the current of the stream in 1 hr and goes 1 km along the current in 10 min. How long will he take to go 5 km in stationary water?
A.	1 hour
B.	3/2 hours
C.	1 hour 15 minutes
D.	40 minutes
Answer» D. 40 minutes