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3 years ago

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Two flat, circular plates are placed on a circular tabletop. The diameter of each plate is equal to the radius of the table top.

Approximately how many square feet of the table top are not covered by the plates? Show or explain your work. Use 3.14 for pi.

1 answer:

erastovalidia [21]3 years ago

6 0

A=pR^2-2pr^2, since R=15 and r=7.5

A=225p-112.5p

A=112.5p

A≈353.25 ft^2

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Now, we have a right triangle here. We can use the Pythagorean theorem, so the distance between the planes will be:

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If we take the derivative of the equation (1) we could find the change of the distance between planes.

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