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solniwko [45]
3 years ago
8

Jessica and Franklin are volunteering to paint one of their community member’s fences for service hours. If Jessica could comple

te the job in 6 hours and Franklin could complete the job in 4.5 hours, how long would it take them to complete the job together, to the nearest minute?
Mathematics
2 answers:
tresset_1 [31]3 years ago
8 0
\frac{1}{t} = \frac{1}{6} + \frac{1}{4.5} = \frac{3+4}{18} = \frac{7}{18} 


t=18/7=2.57 hour =154 min

mezya [45]3 years ago
5 0
2.57 hours approximately
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