   Chapter 8.4, Problem 13E Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085

Solutions

Chapter
Section Elementary Geometry For College St...

7th Edition
Alexander + 2 others
ISBN: 9781337614085
Textbook Problem

A metal circular disk whose area is 143 cm2 is used as a knock out (opening) on an electrical service in a factory. Use your calculator value of π to find the length of the radius of the disk to the nearest tenth of a cm.

To determine

To Find:

The length of the radius of circular metal disk.

Explanation

Given:

The area of the circle is 143 cm2.

Formula:

The area of a circle is A=πr2.

Calculation:

The calculator value of π is 3.142857.

Then the area of a circle is,

143=3.142857r2

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