Abuilding engineer analyzes a concrete column with a circular cross section. the circumference of the column is 18pi meters. what is the area a of the cross section of the column?

Answer

Circumference(C) of a circle is given by:

where r is the radius and value of

As per the given statement:

A building engineer analyzes a concrete column with a circular cross section.

The circumference of the column is meters.

then;

Divide both sides by we have;

9 = r

or

r = 9 meters

We have to find the area of the cross section of the column

Area of a circle is given by:

then;

meter square.

therefore, the area A of the cross section of the column is meter square.

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