It would take john 6 hours to paint a room by himself. It would take Tom 18 hours to paint the same room by himself. Of john and tom work together, each at his individual rate, how many hours will it take the to paint the room.

Question

Mathematics

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14 May, 22:05

It would take john 6 hours to paint a room by himself. It would take Tom 18 hours to paint the same room by himself. Of john and tom work together, each at his individual rate, how many hours will it take the to paint the room.

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Answers (2)

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Mike Chung · Answer 1

Answer: 4h 30min

Step-by-step explanation: Theoretically, if X = Number of hours required to paint the room,

X (1/6+1/18) = 1

X (3/18+1/18) = 1

X (4/18) = 1

X (2/9) = 1

2/9X=1

X=9/2h, or 4 1/2 h

Oswaldo Pratt · Answer 2

12 hrs

Step-by-step explanation:

6+18 = 24

24/2 = 12