Two guns were fired from the same place at an interval of 8 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 the place at what speed (in km/hr) ?
A. 24 km/hr
B. 27 km/hr
C. 30 km/hr
D. 36 km/hr
Answer: Option B
Solution(By Examveda Team)
Let the speed of the man be x m/secThen, distance travelled by the man in 5 min 52 sec
= Distance travelled by sound in 8 sec
$$\eqalign{ & \Leftrightarrow x \times 352 = 330 \times 8 \cr & \Leftrightarrow x = \left( {\frac{{330 \times 8}}{{352}}} \right){\text{m/sec}} \cr & \Leftrightarrow x = \left( {\frac{{330 \times 8}}{{352}} \times \frac{{18}}{5}} \right){\text{km/hr}} \cr & \Leftrightarrow x = 27{\text{ km/hr}} \cr} $$
Related Questions on Speed Time and Distance
A. 48 min.
B. 60 min.
C. 42 min.
D. 62 min.
E. 66 min.
A. 262.4 km
B. 260 km
C. 283.33 km
D. 275 km
E. None of these
A. 4 hours
B. 4 hours 30 min.
C. 4 hours 45 min.
D. 5 hours
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