A boatman goes 2km against the current of the stream in 1 hour and goes 1km along the current in 10 minutes how long will he take to go 5km in stationary water?
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2
Rate downstream = 1 x 60 km/hr = 6 km/hr.
10
Rate upstream = 2 km/hr.
Speed in still water = 1 (6 + 2) km/hr = 4 km/hr.
2
Required time = 5 hrs = 1 1 hrs = 1 hr 15 min.
10
Rate upstream = 2 km/hr.
Speed in still water = 1 (6 + 2) km/hr = 4 km/hr.
2
Required time = 5 hrs = 1 1 hrs = 1 hr 15 min.
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