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22 February, 00:01

A hunter shoots a bullet horizontally at a rock cliff wall that is 170 m away. She hears the sound of the bullet hitting the rock 0.95 seconds later. Knowing that the speed of sound was 340 m/s, what was the speed of the bullet?

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  1. 22 February, 00:18
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    377.78 m/s

    Explanation:

    Let the speed of bullet is v.

    Time taken by the sound is t' and time taken by the bullet is t.

    Speed of sound = 340 m/s

    Distance = 170 m

    Time taken by the sound, t' = distance / speed of sound = 170 / 340 = 0.5 sec

    time taken by the bullet, t = 0.95 - 0.5 = 0.45 sec

    Speed of bullet = distance / time taken by bullet

    Speed of bullet = 170 / 0.45 = 377.78 m/s
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