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 from the following choices
A) 12.59
B) 11.53
C) 15.69
D) 14.56
E) 18.98

Rationale: speed of the boat downstream = 22 + 3 = 25 kmph = 25 * 5 / 18 = 6.94 m / s hence time taken to cover 80 m = 80 / 6.94 = 11.53 seconds . answer : b
Answer: B