The speed at which a man can row a boat in still water is 15 km/hr. If he rows downstream, where the speed of current is 3 km/hr, how many seconds will he take to cover 110 meters?
Pick
A) 18	B) 20	C) 22	D) 24	E) 28
The speed of the boat downstream = 15 + 3= 
<gadget id="calculator">15 + 3</gadget>
<output>18</output>
18 km/hr   18 km/hr * 5/18= 5 m/s   The time taken to cover 110 meters = 110/5= 
<gadget id="calculator">110/5</gadget>
<output>22</output>
22 seconds.   The answer is 20.
<result>B</result>
The speed at which a man can row a boat in still water is 15 km/hr. If he rows downstream, where the speed of current is 3 km/hr, how many seconds will he take to cover 110 meters?