The speed at which a man can row a boat in still water is 6 km/hr. If he rows downstream, where the speed of current is 3 km/hr, how many seconds will he take to cover 80 meters?
Choose the correct choice:
A) 28	B) 32	C) 36	D) 40	E) 44
The speed of the boat downstream = 6 + 3= 
<gadget id="calculator">6 + 3</gadget>
<output>9</output>
9 km/hr   9 km/hr * 5/18= 2.5 m/s   The time taken to cover 80 meters = 80/2.5= 
<gadget id="calculator">80/2.5</gadget>
<output>32</output>
32 seconds.   The answer is 32.
<result>B</result>
The speed at which a man can row a boat in still water is 6 km/hr. If he rows downstream, where the speed of current is 3 km/hr, how many seconds will he take to cover 80 meters?