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aryan agarwal Grade:
        

A hunter wishes to cross a river that is 1.5km wide and flows with a velocity of 5km/h parallel to its bank.The hunter uses a small powerboat that moves at a maximum speed of 12km/h with respesct to the water.What is the minimum time for crossing?

6 years ago

Answers : (1)

vijesh jayan
49 Points
										

LET Vw BE THE SPEED OF BOAT


AND VB BE THE SPEED OF WATER


AND VBW=VB-V-- (1)


GIVEN THAT VW=5Km/h


& VBW=12Km/h


& distance between the banks=1.5Km


FROM Eq (1)


12=VB-(-5)


    =VB+5 → VB=7Km/h


T=[DISTANCE OF THE BANKS]/VB


T=1.5/7


T=0.214 hrs =12.85 min


is what i think


I am not sure with this sum



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6 years ago
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