A population of middle school students contains 160 sixth graders, 180 seventh graders, and 140 eighth graders. Nine seventh gra
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<h3><u>Answer</u>:- </h3>
Since painting is done on outer surface of cubical block we will have to find its surface area which is given by-
- <u>where a is side of the cube </u>
Now,
Thus it would cost $ 307.2 to paint the entire cubical block.