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Two boats A and B start towards each other from two places, 108 km apart. Speed of the boat A and B in still water are 12km/hr and 15km/hr respectively. If A proceeds down and B up the stream, they will meet after.
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- 4.5 hours
- 4 hours
- 5.4 hours
- 6 hours
- 4.5 hours
Correct Option: B
Let the speed of the stream be p kmph and both the boats meet after t hours
Distance between two boats A and B = 108 km
According to the question ,
(12 + p) t + (15 – p ) t = 108
⇒ 12t + 15t = 108
⇒ 27t = 108
| ⇒ t = | = 4 hours | |
| 27 |
