the speed of a motor boat is that of the current of water as 36:5. the boat goes along with the current in 5hr 10min. how much time will it take to come back?
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Answer:6hr50min
Step-by-step explanation:Let the boat and current speed be 36x and 5x. While going along current, resultant speed is
36x+5x=41x. Resultant speed against current is
36x-5x=31x. Time taken by boat while going downstream=5h 10m or 310 m
Reqd. Time for boat to go against current
=310×41x/31x=410 m or 6hrs 50 minutes
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