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33 votes
Working together, Aaron and Rosa can mow the lawn around the local library in 3 hours. Working alone, Aaron can mow the lawn in 5 hours. Write and solve an equation to determine how long it would take Rosa to mow the lawn by herself.

User Ryan Tofteland
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1 Answer

25 votes
25 votes

Answer:

Below

Explanation:

1/a + 1/r = 1/3 a = aaron rate r = rosa rate 3 = rate of both

1/5 + 1/r = 1/3

1/r = 2/15

r = 15/2 = 7.5 hr for rosa alone

User Ganzolo
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