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a boat travels upstream 20km in 6 hrs and 18 km downstream
in 4hrs find the speed of boat in still water
a.1/2kmph b. 7/12kmph c.5kmph d.none of these
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Answer Posted / simone
v_U = 20/6 = v_0 - v_D
v_D = 18/4 = v_0 + v_D
==> 2*v_0 = 20/6+18/4
==> v_0 = 4
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