Math CentralQuandaries & Queries


Question from Bruce, a parent:

Hello there,

I need two cubic yards of concrete for a playgound I am installing for my kids. That much i have figured out. I am stumped over the number of 25kg bags of pre-mixed concrete i will need to accomplish my goal.
Your help would be greatly appreciated.

Hi Bruce,

Do the bags tell you how many cubic feet of concrete they will produce? I have no idea. There are $3 \times 3 \times 3 = 27$ cubic feet in a cubic yard so you need $54$ cubic feet of concrete.


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