The speed at which a boy can row a boat in still water is 60 kmph. If he rows downstream, where the speed of current is 12 kmph, what time will he take to cover 220 metres?	Pick one:
A) 7 B) 8 C) 9 D) 10 E) 11
Speed of the boat downstream = 60 + 12= 
<gadget id="calculator">60 + 12</gadget>
<output>72</output>
72 kmph= 72 * 5/18= 
<gadget id="calculator">72 * 5/18</gadget>
<output>20</output>
20 m/s   Hence time taken to cover 220 m= 220/20= 
<gadget id="calculator">220/20</gadget>
<output>11</output>
11 seconds. Answer: 11
<result>E</result>
The speed at which a boy can row a boat in still water is 60 kmph. If he rows downstream, where the speed of current is 12 kmph, what time will he take to cover 220 metres?