A few days ago
Anonymous

If Susan can paint a room in 2 hours and mary can paint the same room in 8 hours.How long will it take 2gether

If Susan can paint a room in 2 hours and mary can paint the same room in 8 hours.How long will it take 2gether

Top 3 Answers
A few days ago
charonnisis

Favorite Answer

Assume the room is 8 parts

Susan = 4parts/hr –> .0667parts/min

Mary= 1 part/hr –> .0167parts/min

8 = .0667(x) + .0167(x)

8 = .0834(x)

x = 95.9min –> 1hour 36min

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A few days ago
G.V.
1/2 t + 1/8 t = 1

5/8 t = 1

t = 8/5 hr. = 1 3/5 hr = 1 hr 36 min

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A few days ago
Anonymous
4 hours.
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