Asked by Natalia
Richard takes 35 minutes to mow a lawn, but with the help of his friend Joe it only took him 15 minutes. If Joe worked alone, how long would it take Joe to mow the same lawn?
Answers
Answered by
Steve
If it takes Joe x minutes alone, then
1/35 + 1/x = 1/15
1/35 + 1/x = 1/15
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