February 25, 2017

Homework Help: math

Posted by muffy on Saturday, September 12, 2009 at 12:31pm.

Shelby can paint a room in 4 hours. Zoe can paint the same room in 7 hours. How long will it take them to paint the room if they work together? If they start 9:30a.m., and want to see a movie that is playing 45 minutes from their house and starting 12:00 p.m., will they make it on time? If they can make it, how early are they? If they will be late, how late will they be?

Please let me know if I am correct.

First I took the average of 4 and 7 and got 5.5 hours. So they can both paint the room in 5.5 hours.

Next, If they start at 9:30 they will finish at 3:00

Next if they have to leave 45 minutes early to get to a 12:00 show, they should leave at 11:15.

Next, therefore, they will be 3:45 minutes late for the 12:00 show.

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