SOLUTION: Two street sweepers can clean the streets of a town in 6h. By himself, the newer sweeper cleaned the street in 10.5h. How much time would the older sweeper require to clean the str

Question 936709: Two street sweepers can clean the streets of a town in 6h. By himself, the newer sweeper cleaned the street in 10.5h. How much time would the older sweeper require to clean the streets working alone?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
r = w/t
x = time of older sweeper
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rates are additive:
1/10.5 + 1/x = 1/6
1/x = 1/6 - 1/10.5
x = 1/(1/6 - 1/10.5)
x = 14
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answer:
14 hours
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