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суббота, 19 апреля 2014 г.

Circles - Circumference, Area Problems

Category: Plane Geometry

"Published in Vacaville, California, USA"

A storage bin of circular base has 324 sq. ft. of floor space. Find the radius of the floor.

Solution:

To illustrate the problem, it is better to draw the figure as follows

Photo by Math Principles in Everyday Life  


The area of a circular storage bin is given by the formula


Substitute the value of the area of a circular storage bin in order to solve for its radius, we have