Jasmine can oil the lanes in a bowling alley in 10 hours. One day her friend joe helped her and it only took 4.44 hours. Find ho
w long it would take joe to do it alone
1 answer:
Jasmine's rate is 1/10 alleys per hour
Together their rate is 1/4.44 alleys per hour.
Joe's rate must be
1/4.44 - 1/10 = 139/1110 alleys per hour
It would take Joe
1110/139 ≈ 7.99 hours to do an alley alone.
Let's call it 8 hours.
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