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 40 km in 10 hours. How much time he would have saved if the direction of tide has not changed?
Choose the correct choice from the following options.
A) 2 B) 8 C) 1 D) 6 E) 5

Rationale: explanation : he covered 5 km in 1 hour , so he might cover 40 km in 8 hours . but he took 10 hours . he would have saved 10 â € “ 8 = 2 hours . answer : a
Answer: A