Question:
Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
[A].16 hours
18 hours
20 hours
24 hours
Speed of a boat in standing water is 9 kmph and the speed of the stream is 1.5 kmph. A man rows to a place at a distance of 105 km and comes back to the starting point. The total time taken by him is:
[A].
[B].
[C].
[D].
Answer: Option D
Explanation:
Speed upstream = 7.5 kmph.
Speed downstream = 10.5 kmph.
| Total time taken = | 105 | + | 105 | hours = 24 hours. | |
| 7.5 | 10.5 |