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A boat running down stream 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 ?
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- 4 kmph
- 6 kmph
- 8 kmph
- Data inadequate
- 4 kmph
Correct Option: B
From the question ,
| Rate upstream = | kmph = 8 kmph | |
| 2 |
| Rate downs tream = | kmph = 4 kmph | |
| 4 |
| ∴ speed of boat in still water = | (Rate upstream + Rate downstream) | |
| 2 |
| speed of boat in still water = | (8 + 4) kmph = 6 kmph | |
| 2 |
