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vlactawhalm29
25.09.2019 •
Mathematics
If you are 7.2 miles away from lightning flash, how long will it take the sound of thunder to reach you?
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Ответ:
Perimeter r = 72 cm
Perimeter s = 36 cm
Side r = ???
Side s = 6 cm
72/36 = side_r/ 6 Cross multiply
72 * 6 = 36 * side_r
432 = 36 side_r Divide by 36
432 / 36 = side_r
12 = side_r