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I need an answer and explanation for this math problem?
You are to paint the globe held aloft by the statue of Atlas. Its diameter is 10.5 ft. How much surface area must you cover with paint? I have the answer that the book gives, but I need someone to explain how they came up with it, because their calculations seem to be wrong, or maybe I'm just not getting it?!
Thanks, Jack A. I should have been able to figure that out! Brain f@rt! For some reason, we were using the formula for the area of a circle, not diameter! No wonder we couldn't figure it out! That's what happens to us old folk late in the day. It's best to leave the "cipherin" for the morning! Thanks for the help!
1 Answer
- 1 decade agoFavorite Answer
To find the surface area of a sphere, SA=4 time pi time the radius squared
Since the Diameter is 10.5, the radius is 5.25, and 4 times pi is 12.57 rounded.
5.25 squared is 27.56
27.56*12.57 is 346 so you would have to paint 346 feet or roughly that
