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A boat covers 20 km in 4 hours along the current and 9 km in 3 hours against the current. What is the speed of the current ?
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- 2 kmph
- 1 kmph
- 1.5 kmph
- 1.75 kmph
- 2 kmph
Correct Option: B
On the basis of given details in above question , we have
| Rate downstream = | = 5 kmph | |
| 4 |
| Rate upstream = | = 3 kmph | |
| 3 |
| ∴ Speed of current = | (Rate downstream - Rate upstream) | |
| 2 |
| Speed of current = | (5 - 3) = 1 kmph | |
| 2 |
