Speed of a boat is 5km per hour in still water and the speed of the stream is 3 km per hour. If the boat takes 3 hours to go to a place and come back, the distance of the place is :

Speed of a boat is 5km per hour in still water and the speed of the stream is 3 km per hour. If the boat takes 3 hours to go to a place and come back, the distance of the place is :
1). 3.75 km
2). 4 km
3). 4.8 km
4). 4.25 km

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