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 30 km in 10 hours. How much time he would have saved if the direction of tide has not changed?	Answers:
A) 2	B) 8	C) 4	D) 6	E) 5
Explanation:   He covered 5 km in 1 hour , so he might cover 30 km in 6 hours.   But he took 10 hours.   He would have saved 10 â€“ 6 = 4 hours.   Answer: 4
<result>C</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 30 km in 10 hours. How much time he would have saved if the direction of tide has not changed?