A river flows at 3m/s and is 300m wide. a man swims across the river at 2m/s perpendicular to the river current. how long does it take to cross the river? how far down the river does he reach the opposite bank?
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Answer:
The time taken by the man to cross the river =150 seconds
He reaches the opposite bank at a distance of 450 m
Step-by-step explanation:
These kind of questions can be solved by solving the x and y components seperately
The direction of flow of the river be along the x direction, therefore vx=3m/s
The velocity of men = 2m/s
Distance he has to cover =300m
Time taken= distance÷velocity
=300÷2
= 150s , is the time taken by the man to cross the river
At the same interval the man will cover some distance along the x direction
= 3×150= 450m
He reaches the opposite bank at a distance of 450 m .
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