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It takes Trevon ten hours to clean an attic Cody can clean the same attic in seven hours Find how long it would take them if they worked together?
Wiki User
∙ 14y ago
distance = rate * time
Trevon:
rate = 1/10 attic/hour
Cody:
rate = 1/7 attic/hour
1 attic = (1/10)x+(1/7)x = (1/10+1/7)x
1 = 17x/70
17x = 70
x = 70/17 ~= 4.1 hours
Wiki User
∙ 14y ago
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