A man can row a distance of 5 km in 60 min with the help of the tide. The direction of the tide reverses with the same speed. Now he travels a further 20 km in 20 hours. How much time he would have saved if the direction of tide has not changed? Pick
A) 2	B) 8	C) 1	D) 6	E) 16
Explanation:   He covered 5 km in 1 hour , so he might cover 20 km in 4 hours.   But he took 20 hours.   He would have saved 20 â€“ 4 = 16 hours.   Answer: 16
<result>E</result>
A man can row a distance of 5 km in 60 min with the help of the tide. The direction of the tide reverses with the same speed. Now he travels a further 20 km in 20 hours. How much time he would have saved if the direction of tide has not changed?