dimension

dimension

A pyramid of 1cm* 1cm cubed is formed. The bottom layer has a 9*9 arrangement of these cubes. The second layer has 7*7 arrangement. The third layer has 5*5

arrangement. The fourth layer has 3*3 arrangement. The top layer is a single layer cube. The sides and top of the pyramid were painted(not the bottom). How many square

centimeters in total were painted

 
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