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 120 metres?
Answers:
A) 16 seconds	B) 34 seconds	C) 14 seconds	D) 12 seconds	E) 24 seconds
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 120 m= 120/5= 
<gadget id="calculator">120/5</gadget>
<output>24</output>
24 seconds.   Answer: 24 seconds
<result>E</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 120 metres?