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A boat crosses a river of width 1 km along the shortest path in 15minutes. If the speed of boat in still water is 5 km/h, then speedof river stream is |
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Answer» the velocity of the river is 3 km /h I have more questions can u help me ?? let the velocity of the river be x. the velocity of the river will be in the horizontal direction. velocity of boat in still water is 5km/hr. As the width of the river is 1 km and time taken by the boat to cross the river along the shortest path is 15 min. Therefore, the velocity of the boat is= 1*60/15= 4km/hr according to the figure the velocity of the river is along AB . By applying triangle law of vector addition the value of AB comes to be 3km/hr yes, the moderators will help you out in best possible way. Ask your doubts one by one separately. |
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