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Sally can paint a room in 5 hours while it takes steve 7 hours. How long would it take them together?

 Apr 19, 2020
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1/7  + 1/5  = 1/x      x is the time together

5/35  + 7/35  = 1/x

12/35   = 1/x

x = 35/12 = 2.92 hours  =   2 hours 55 min

 Apr 19, 2020

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