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10 May, 10:10

How do you solve this type of equation?

John can bake cookies in 1 hour

Mary can bake cookies in 2 hours

How fast can they bake cookies together?

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Answers (2)
  1. 10 May, 11:48
    0
    40 minutes. for example if john can bake 60 in 60 minutes and MAry 30 in 60 minutes that means she can bake 1 in 2 minute so, in 40 minutes JOhn bake 40 and MAry in 40 minutes can bake 20, so John+Mary=40+20=60
  2. 10 May, 13:59
    0
    2 hours because Mary can't make them any faster
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