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OpenStudy (anonymous):
A cable installer can make 20 installations in 8 hours. How long will the installer spend making 30 installations? h
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OpenStudy (z4k4r1y4):
if 20 installations take 8hrs then 10 installations take 4hrs. do you agree?
OpenStudy (z4k4r1y4):
so you have 20 + 10 and 8 + 4
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