The speed at which a woman can row a boat in still water is 120 kmph. If she rows downstream, where the speed of current is 60 kmph, what time will he take to cover 500 metres?
Select the correct option
A) 8
B) 9
C) 10
D) 11
E) 12
Speed of the boat downstream = 120 + 60= 
<gadget id="calculator">120 + 60</gadget>
<output>180</output>
180 kmph= 180 * 5/18= 
<gadget id="calculator">180 * 5/18</gadget>
<output>50</output>
50 m/s   Hence time taken to cover 500 m= 500/50= 
<gadget id="calculator">500/50</gadget>
<output>10</output>
10 seconds.   Answer: 10
<result>C</result>
The speed at which a woman can row a boat in still water is 120 kmph. If she rows downstream, where the speed of current is 60 kmph, what time will he take to cover 500 metres?