The speed at which a man can row a boat in still water is 22 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 80 metres?
Choose the correct choice:
A) 12.59 B) 11.53 C) 15.69 D) 14.56 E) 18.98
Speed of the boat downstream = 22 + 3= 
<gadget id="calculator">22 + 3</gadget>
<output>25</output>
25 kmph= 25 * 5/18 = 6.94 m/s
Hence time taken to cover 80 m = 80/6.94
= 11.53 seconds.
Answer:11.53
<result>B</result>
The speed at which a man can row a boat in still water is 22 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 80 metres?