The speed at which a man can row a boat in still water is 14 kmph. If he rows downstream, where the speed of current is 2 kmph, what time will he take to cover 40 metres? Choose the correct answer:
A) 16 seconds
B) 34 seconds
C) 9 seconds
D) 12 seconds
E) 15 seconds

Rationale: "speed of the boat downstream = 14 + 2 = 16 kmph = 16 * 5 / 18 = 40 / 9 m / s hence time taken to cover 40 m = 40 * 9 / 40 = 9 seconds . answer : c"
Answer: C