Example 3

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The following word problem is for practicing the application of measurements of ordinary shaped objects.

Example 2:

What is the surface area of a circle with a diameter of 35 inches?

To solve this problem use the formula that states that the area of a circle is the constant pi (approximately 3.14) times the radius (diameter ÷ 2) squared. First solve for the radius to shorten the equation and solve for the area of the circle.

                    

35 ÷ 2 = the radius of the circle
35 ÷ 2 = 17.5
3.14 × 17.5² = the area of the circle
3.14 × 17.5² = 961.6

The area of the circle is 961.6 cubic inches.