A boat can travel with the speed of 13km/hr in still water.if the speed of the stream is 4km/hr, find the time taken by the boat to go 68km downstream.
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down stream = still water + current
= 17 km/h
V = 68/t
17 = 68/t
t = 4hr
= 17 km/h
V = 68/t
17 = 68/t
t = 4hr
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