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?
2 hours because Mary can't make them any faster
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