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Mathematics, 01.07.2019 10:30 sarbjit879

Jeff and kirk can build 75 feet retaining wall together in 3 hours. because jeff has more experience, he could build the wall by himself 1 hour quicker than kirk. how long would it take kirk to build the wall by himself.

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Jeff and kirk can build 75 feet retaining wall together in 3 hours. because jeff has more experience...
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