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OpenStudy (anonymous):
shawna can paint a fence in 5 hrs. Jassie can paint the same fence in 10 hrs. how long will it take them to paint the fence together56 seconds ago Live preview of your reply:shawna can paint a fence in 5 hrs. Jassie can paint the same fence in 10 hrs. how long will it take them to paint the fence together2 minutes ago
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OpenStudy (watchmath):
shawna speed = 1/5 ( 1 unit of fence for every 5 hours) jessie speed = 1/10 combine speed = 1/5 + 1/10 = 3/10 So they can finish 3 fence for every 10 hours For one fence they just need 10/3 hours.
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