The speed at which a man can row a boat in still water is 20 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 60 metres? Choose the correct option.
A) 16 seconds	B) 76 seconds	C) 26 seconds	D) 9.4 seconds	E) 18 seconds
Speed of the boat downstream = 20 + 3= 
<gadget id="calculator">20 + 3</gadget>
<output>23</output>
23 kmph= 23 * 5/18 = 115/18 m/s   Hence time taken to cover 60 m   = 60*18/115   = 9.4 seconds.   Answer: 9.4 seconds
<result>D</result>
The speed at which a man can row a boat in still water is 20 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 60 metres?