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OpenStudy (anonymous):
david can unload a delivery truck in 20 minutes. joe can unload the truck in 35 minutes. how long will the unloading take if they work together?
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OpenStudy (anonymous):
david does 1/20 of work in one minutes joe does 1/35 of work in one minutes
OpenStudy (anonymous):
~1=~1
OpenStudy (anonymous):
(1/20 +1/35)x=1
OpenStudy (anonymous):
find x
OpenStudy (anonymous):
I got something close to 12 minutes
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OpenStudy (anonymous):
thank you!
OpenStudy (anonymous):
12.7273 to be more accurate
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