A boatman goes 2 km against the current of the stream in 1 hour and goes 1 km along the current in 10 minutes. How long will it take to go 5 km in stationary water?
Solution
Correct Answer: Option C
Ratedownstream
=(1/10×60)km/hr =6km/hr
Rateupstream=2km/hr
Speed in still water
=1/2(6+2)km/hr
=4km/hr
∴Requiredtime=5/4hrs
=1 (1/4)hrs
=1 hr 15min.
=(1/10×60)km/hr =6km/hr
Rateupstream=2km/hr
Speed in still water
=1/2(6+2)km/hr
=4km/hr
∴Requiredtime=5/4hrs
=1 (1/4)hrs
=1 hr 15min.
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