Question: A boat running downstream covers a distance of 16 km in 2 hours while for covering the same distance upstream, it takes 4 hours. What is the speed of the boat in still water?
[A].4 km/hr
6 km/hr
8 km/hr
Data inadequate
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
| Rate downstream = | 16 | kmph = 8 kmph. | |
| 2 |
| Rate upstream = | 16 | kmph = 4 kmph. | |
| 4 |
| Speed in still water = | 1 | (8 + 4) kmph = 6 kmph. |
| 2 |
Video Explanation: https://youtu.be/3D8uAfzz3l0