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Acar,37. A river 4.0 miles wide is flowing at the rate of2 miles/h. If minimum path is taken, find timetaken by a boat to cross the river with a speedv = 4 miles/h (in still water) is approximatelyacceleratit coversthe car!rest afteul. |
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Answer» I don't know this answer sorry width of the river d=4 miles speed of water v=2 miles/h ER. RAVI KUMAR ROY minimum time only taken to cross the river when the speed of boat is parallel to the resultant speed of v and u(when u = speed of boat= 4miles/h)now ,the resultant speed w = √(v)2+(u)2 d = w t minimum time t = 4/2√5 = 2√5 h |
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