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siniylev [52]
3 years ago
9

joe and Bill are working on building a stone wall that will be 120 feet long. Joe works from one end and is able to build one te

n foot section in 5 hours. Bill starts from the other end and is able to finish a ten foot section in 4 hours. How long will it take Joe and Bill to finish building the wall?
Mathematics
2 answers:
konstantin123 [22]3 years ago
4 0

Joe completes an average of (10 ft)/(5 h) = 2 ft/hour. Bill completes an average of (10 ft)/(4 h) = 2.5 ft/hour. Together, they complete 2+2.5 = 4.5 ft/hour. At that rate, it will take them

... (120 ft)/(4.5 ft/h) = 26 2/3 h

Nuetrik [128]3 years ago
4 0
26 hours to complete the wall
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