Posted by Tina on Sunday, November 27, 2011 at 5:57pm.
Sue can shovel snow from her driveway in 45 minutes. Jim can do the same job in 55 minutes. How long would it take them if they worked together?

Algebra  Henry, Monday, November 28, 2011 at 7:34pm
T = t1*t2 / (t1+t2),
T = 45*55 / (45+55) = 24.75Min.

Algebra  Anonymous, Monday, October 10, 2016 at 2:49pm
Maria can shovel snow from her driveway in 50 min. Tom can do the same job in 55 minutes. how long would it take Maria and Tom to shovel the driveway if they work together?
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