Two guns are fired from the same place at an interval of 6 minutes A person approaching the place ob...........

Quantitative Aptitude (CGL) Time & distance

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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Explanation:

Difference of time = 8 second
So, distance covered by 352 s (5 × 60 + 52) second by man
= distance covered by sound in 8 second
S × 352 = 330 × 8
Here S is the speed of man in m/s
S = 15/2 m/s
So, speed in km/hr
S = 15/2×18/5=27 km/hr