SOLUTION: diana can decorate 15 cookies in an hour; jane can decorate 15 cookies in two hours. how many hours would it take to decorate 60 cookies if they worked together?
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Question 886337: diana can decorate 15 cookies in an hour; jane can decorate 15 cookies in two hours. how many hours would it take to decorate 60 cookies if they worked together?
Answer by JulietG(1812) (Show Source): You can put this solution on YOUR website!
Diana decorates 15 cookies per hour
Jane decorates 7.5 cookies per hour
Total per hour for both combined is 22.5 cookies per hour
60 / 22.5 = 2 hour or 2 hours 40 minutes
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