The speed at which a man can row a boat in still water is 18 kmph. If he rows downstream, where the speed of current is 6 kmph, what time will he take to cover 100 metres?  Select the correct option
A) 6.67 seconds	B) 18 seconds	C) 26 seconds	D) 14.99 seconds	E) 6 seconds

Rationale: "speed of the boat downstream = 18 + 6 = 24 kmph = 24 * 5 / 18 = 6.67 m / s hence time taken to cover 100 m = 100 / 6.67 = 14.99 seconds . answer : d"
Answer: D