self Maths Puzzle Numerical Ability Time Distance and Speed

a person shooting at a target from a distance of 450m finds that the sound of the bullet hitting the target comes 1/2 secs after he fired.a person equidistant from the target the shooting pt.hears the bullet hit the target 3 secs after he heared the gun.the speed of the sound?

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Description for Correct answer

Average speed = TotaldistanceTotaltimeTotaldistanceTotaltime

S = 450m112s450m112s

=300 m/s
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