Posted by john on Monday, July 23, 2012 at 12:11am.
Frank can type a report in 4 hours and James takes 6 hours. How long will it take the two of them typing together?

math  Brooke, Monday, July 23, 2012 at 12:43am
Add the two hours together.

correction  math  Reiny, Monday, July 23, 2012 at 8:14am
Brooke's answer makes no sense
Frank's rate = 1/4
James rate = 1/6
combined rate = 1/4 + 1/6 = 5/12
time at combined rate = 1/(5/12)
= 12/5
= 2.4 hours

math  sarah, Thursday, January 22, 2015 at 3:44pm
290*48459385\6853]3763]= 1480264095740
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