-
A boat goes 75 km upstream in 3 hours and 60 km downstream in 1.5 hours. The speed of the boat in still water is :
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- 32.5 kmph
- 30 kmph
- 65 kmph
- 60 kmph
- 32.5 kmph
Correct Option: A
As per the given question ,
| Rate upstream of boat = | = 25 km/hr | |
| 3 |
| Rate downstream of boat = | = 40 km/hr | |
| 1.5 |
| ∴ Speed of boat in still water = | ( Rate upstream + Rate downstream ) | |
| 2 |
| Speed of boat in still water = | (25 + 40) | |
| 2 |
| Speed of boat in still water = |  | × 65 |  | = 32.5 kmph | |
| 2 |
