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A boat can travel with a speed of 13 km/hr in still water. If the speed of stream is 4 km/hr in the same direction, time taken by boat to go 63 km in opposite direction is
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- 9 hrs
- 4 hrs
- 7 hrs
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3 9 hrs 17
Correct Option: B
Given that , speed of stream = 4 km/h
speed of boat = 13 km/h
Rate upstream of boat = 13 – 4 = 9 kmph
Distance = 63 km
| ∴ Required time = | ||
| Speed |
| ∴ Required time = | = 7 hours | |
| 9 |
We can find the required answer with the help of given formula :
| ∴ Speed = | ||
| Time |
