The distance between two places A and B is 14 km. A boat travels from A to B downstream and then returns from B to A upstream and takes a total of 3 hours 44 minutes for the entire journey. If the speed of the current is 2 km/h, then what is the speed of the boat, in km/h, in still water?
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 8
| Understanding | Application |
| Tricks |
Let the speed of the boat is x km/hour So 14/(x + 2) + 14/(x - 2) = 3 h 44 min |
| Now |
Here we use the option 14(8 + 2) + 14/(8 - 2) = 1.4 + 2.33 = 3.73 |
| Hence | speed of boat = 8 km/hour |