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Mathematics, 20.11.2020 06:20 mariposa91

a rock dropped 4 9/10 meters in the first second, and at the very next second it falls 9 4/5 meters more than the previous second. FInd the depth of the well if the rock touches the water in the well in 3 seconds.

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a rock dropped 4 9/10 meters in the first second, and at the very next second it falls 9 4/5 meters...
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