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Mathematics, 18.02.2021 19:30 newjersey4015

If p varies jointly as q and r , and p = 150 when q = 18, and r = 5, find q when p = 345 and r = 9

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If p varies jointly as q and r , and p = 150 when q = 18, and r = 5, find q when p = 345 and r = 9...
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