Question

A man can row 14 km/hr in still water. ln, the stream flowing with the speed of 10 km/hr he takes 4 hours to move with the stream and come back. Find the distance he rowed the boat.

पर्याय

• 11.71 km

• 13.71 km

• 14.71 km

• 12.71 km

Answer 1

13.71 km

Explanation:

Let Distance be = D

Speed in upstream = 14 − 10 = 4 km/hr

Speed in downstream = 14 + 10 = 24

Time =  D/S

According to question

`"D"/4+"D"/24=4`

`(7"D")/24=4`

`⇒"D"=96/7=13.71`Km