a man swims downstream distance of 15 km in 1 hour if the speed of the current is 5 km per hour the time taken by the main to swim the same distance upstream is
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Answer:
DOWNSTREAM
distance=15 km
time=1hr
speed=d/t=15/1=15 km/hr
speed of current=5km/hr
then, speed of man in still water=15-5=10 km/hr
UPSTREAM
distance=15 km
speed upstream=(10-5)km/hr=5 km/hr
time=d/s=15/5=3 hr
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