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A and B are 20 km apart. A can walk at an average speed of 4 km/hour and B at 6 km/hr. If they start walking towards each other at 7 a.m., when they will meet ?
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- 8.00 a.m.
- 8.30 a.m.
- 9.00 a.m.
- 10.00 a.m.
Correct Option: C
If A and B meet after t hours, then
4 t + 6 t = 20
⇒ 10 t = 20
| ⇒ t = | = 2 hours. | |
| 10 |
Hence, both will meet at 9 a.m.
