The speed at which a man can row a boat in still water is 15 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 15 metres?	Choose the most appropriate option: A) 5 B) 10 C) 3 D) 12 E) 6
Speed of the boat downstream = 15 + 3= 
<gadget id="calculator">15 + 3</gadget>
<output>18</output>
18 kmph= 18 * 5/18= 
<gadget id="calculator">18 * 5/18</gadget>
<output>5</output>
5 m/s   Hence time taken to cover 60 m= 15/5= 
<gadget id="calculator">15/5</gadget>
<output>3</output>
3 seconds.   Answer: 3
<result>C</result>
The speed at which a man can row a boat in still water is 15 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 15 metres?