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CBSE Class 11-science Answered

A river is flowing at 2m/s . A man is sailing at a velocity 10m/s with respect to river in a direction perpendicular to the river. If the width of the river is 400m , then how far from the directly opposite to starting point does he reach on another bank ? 
Asked by arunavamitra50 | 08 Jul, 2018, 04:30: PM
answered-by-expert Expert Answer
width of river = 400 m
 
swimming speed = 10 m/s;
 
time taken to cross the river = ( distance / speed ) = 400/10 = 40 s ;
 
Horizontal displacement due to river speed = speed×time = 40×2 = 80 m
Answered by Thiyagarajan K | 09 Jul, 2018, 11:23: AM
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