The speed at which a man can row a boat in still water is 14 kmph. If he rows downstream, where the speed of current is 2 kmph, what time will he take to cover 40 metres? Choose the most appropriate option:
A) 16 seconds	B) 34 seconds	C) 9 seconds	D) 12 seconds	E) 15 seconds
Speed of the boat downstream = 14 + 2= 
<gadget id="calculator">14 + 2</gadget>
<output>16</output>
16 kmph= 16 * 5/18 = 40/9 m/s   Hence time taken to cover 40 m = 40*9/40= 
<gadget id="calculator">40*9/40</gadget>
<output>9</output>
9 seconds.   Answer: 9 seconds
<result>C</result>
The speed at which a man can row a boat in still water is 14 kmph. If he rows downstream, where the speed of current is 2 kmph, what time will he take to cover 40 metres?