A person standing at a certain distance from a wall produces a loud sound. He hears the echo of the sound after 1.8 s. Calculate the distance between the wall and the observer if the velocity of sound in air is 340 m/s. |
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(a) |
612 m |
(b) |
306 m |
(c) |
377.7 m |
(d) |

A person standing at a certain distance from a wall produces a loud sound. He hears the echo of the sound after 1.8 s. Calculate the distance between the wall and the observer if the velocity of sound in air is 340 m/s. |
|||||||

(a) |
612 m |
(b) |
306 m |
(c) |
377.7 m |
(d) |

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