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Boats and Streams
A man wishes to cross a river perpendicularly. In still water, he takes 4 minutes to cross the river,but in flowing river he takes 5 minutes. If the river is 100 m wide, the velocity of the flowing water of the river is
Read Solution (Total 2)
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- speed in still water , s= 100/4 = 25 mtr/min
if w is speed of flowing water, then
speed in flowing water = s-w = 100/5 = 20 mtr/min
speed of flowing water = 25-20= 5 mtr/min - 12 years agoHelpfull: Yes(15) No(7)
- 100/4=25
100^2+5s^2 = (5*25)^2
25s^2= 5652
s^2= 225
s=15 - 8 years agoHelpfull: Yes(2) No(0)
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