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Mathematics, 08.09.2021 19:30 TropicalFan

Plz help me! If Joe can paint a house in 3 hr, and Sam can paint the same house in 5 hr, how long does it take them to do it together?

Formulas: r=\frac{1}{t}


A=rt

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Plz help me! If Joe can paint a house in 3 hr, and Sam can paint the same house in 5 hr, how long...
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