The speed of a boat in standing water is 6 km/h and the speed of the stream is 2.5 km/h. A man rows to a place at a distance of 59.5 kilometres and comes back to the starting point. The total time taken by him is:
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. 24 hours.
Given:
The speed of a boat in standing water x = 6 km/h
The speed of the stream y = 2.5 km/h
A man rows to a place at a distance of 59.5 kilometres and comes back to the starting point
Explanation:
According to the question
Downward speed of the boat = 6 + 2.5 = 8.5 km/h
Upward speed of the boat = 6 - 2.5 = 3.5 km/h
Hence,
Total time taken by him = 59.5/8.5 + 59.5/3.5 = 7 + 17 = 24 hours