A man can swim with a speed of 4km/hr in still water.how long he will take to cross the river 1 km wide,if river flows steadily at 3km/hr and he makes his stroke normal to the river current.how far in the river does he go,when he reaches the other bank?
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speed of the man while swimming = 4km/hr
speed of water=3km/hr
total speed = 7km/hr
length of the river = 1km
time= distance/ speed
time=0.1428571429 hrs approx
nashwaanees:
r u sure is it crrct ?
yes
no its wrong i guess
I guess it is correct
it is something related with vector addition
we should apply vector addition
hi Sarah
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