A man can row 7 ½ kmph in still water.if in a river running at 1.5 km/hr an hour,it takes him 50 minutes to row to a place and back,how far off is the place?
Choose the correct choice from the following choices:
A) 4km
B) 2km
C) 5km
D) 3km
E) 1km
Speed downstream =(7.5+1.5)km/hr=9 km/hr;   Speed upstream=(7.5-1.5)= 
<gadget id="calculator">(7.5-1.5)</gadget>
<output>6</output>
6kmph.   Let the required distance be x km.then,   x/9+x/6=50/60.   2x+3x=(5/6*18)   5x=15   x=3.   Hence,the required distance is 3km   ANSWER 3km 3km
<result>D</result>
A man can row 7 ½ kmph in still water.if in a river running at 1.5 km/hr an hour,it takes him 50 minutes to row to a place and back,how far off is the place?