The speed at which a man can row a boat in still water is 20 kmph. If he rows downstream, where the speed of current is 3 kmph, what time will he take to cover 60 metres?	Choose the correct choice from the following answers:	A) 16 seconds	B) 76 seconds	C) 26 seconds	D) 9.4 seconds	E) 18 seconds

Rationale: "speed of the boat downstream = 20 + 3 = 23 kmph = 23 * 5 / 18 = 115 / 18 m / s hence time taken to cover 60 m = 60 * 18 / 115 = 9.4 seconds . answer : d"
Answer: D