A boat is moving 2 km against the current of the stream in 1 hour and moves 1 km in the direction of the current in 15 minutes. How long will it take the boat to go 5 km in stationary water?
1
1 hr 20 minutes
2
1 hr 15 minutes
3
1 hr 30 minutes
4
1 hr 40 minutes
5
45 minutes