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G SOMAIAH Grade: Upto college level
        

a person can swim instillwater at 5kmph.he aims on one bank of river at an angle of 300with normal to the flow to reach opposite point of start in 1/√3hr the width of the river is--km


 

7 years ago

Answers : (1)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear G Somaiah




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he reaches at the apposite end  of the rever then his horizontal component of speed must be equal to the velocty of the river


  vertical componen of velocit =5cos30 = 5√3 /2 km/h


 now time teken to cross the river = 1/√3  hr


so 1/√3 = d /5√3 /2


   d=5/2 km


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Badiuddin

7 years ago
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