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Two guns are fired from the same place at an interval of 6 minutes. A person approaching the place observes that 5 minutes 52 seconds have elapsed between the hearing of the sound of the two guns. If the velocity of the sound is 330 m/sec, the man was approaching that place at what speed (in km/hr) ?
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- 24
- 27
- 30
- 36
Correct Option: B
Difference of time
= 6 min. – 5 min. 52 sec.
= 8 seconds
Distance covered by man in 5 min.52 seconds
= Distance covered by sound in 8 seconds
= 330 × 8 = 2640 m.
| ∴ Speed of man = | |
| 5 min. 52 sec. |
| = | m/sec | |
| 352 |
| = | × | kmph | ||
| 352 | 5 |
= 27 kmph
