F9RK. Mgmt. 27, the task 1

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Uploaded: 27.11.2016
Content: Ф9РК. Упр. 27, задача 1.rar (5,54 kB)


1. The observer is at a distance of 200 meters from the high mountains. After a period of time he will hear the echo of the spoken word? The speed of sound is 340 m / s.


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