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A proposed new $5 coin is called the foonie. The foonie's two faces are identical and each has area 5 cm2. The thickness of the foonie is 0:5 cm. How many foonies are in a stack that has a volume of 50 cm3?

 Jun 17, 2020
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The volume of a foonie will be the area of its face times its thickness:  5 cm2 x 0.5 cm  =  2.5 cm3.

 

To find the number of foonies in a stack of volume 50 cm3, we can divide the volume of the stack

by the volume of each foonie:  50 cm3 / 2.5 cm3  =  20 foonies

 Jun 17, 2020

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