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Mathematics, 31.05.2020 00:01 dtaylor7755
The two discs in the figure rotate at different speeds. The smaller disc rotates once every 6 minutes. The larger disc takes 21 minutes to rotate. If they both start rotating at the same time, how long until the two arrows align again?
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The two discs in the figure rotate at different speeds. The smaller disc rotates once every 6 minute...
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