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A constable follows a thief who is 200 m ahead of the constable. If the constable and the thief run at speed of 8 km/hour and 7 km/hour respectively, the constable would catch the thief in
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- 10 minutes
- 12 minutes
- 15 minutes
- 20 minutes
Correct Option: B
The constable and thief are running in the same direction
∴ Their relative speed = 8 – 7 = 1km.
| = 1 × | m/sec. | |
| 18 |
| ∴ Required time = | |||||
| 18 | |||||
| = | = 720 sec | |
| 5 |
| = | minutes = 12 minutes | |
| 60 |
