A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.

A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream. Correct Answer 4 hours

Downstream speed = speed of boat + speed of stream = 13 km/hr + 4 km/hr = 17 km/hr Now, 17 km goes in 1 hour 1 km goes in 1/17 hour 68 km goes in ( 68×1)/17 hour = 4 hour
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