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A boat man can row with a speed of 10 km...

A boat man can row with a speed of 10 km/hr. in still water. The river flow steadily at 5 km/hr. and the width of the river is 2 km. if the boat man cross the river with reference to minimum distance of approach then time elapsed in rowing the boat will be:-

Text Solution

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The correct Answer is:
4
`R=(u^(2) sin 2theta)/g`
`R=((10)^(2) sin 60^(@))/10`
`R=10xxsqrt(3)/2=5sqrt(3)=8.66 m`
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