A boat ma goes 2km against the current of the stream in 1 hr and goes 1 km along the current in 10 min. how long will it take to go 5 km in stationary water  Choose the most appropriate option: A) 40 min B) 1hr C) 1hr 15 min D) 1hr 30 min E) 4 hr
rate down stream=(1/10*60)km/hr=6km/hr   rate up stream=2km/hr   speed still water =1/2(6+2)=4km/hr   required time =(5/4)=1 1/4=1hr 15 min   Answer(1hr 15 min)
<result>C</result>
A boat ma goes 2km against the current of the stream in 1 hr and goes 1 km along the current in 10 min. how long will it take to go 5 km in stationary water