Question

Find the circumference of a circular swimming pool with a diameter of 18 feet. Use 3.14 as an approximation for pie round your answer to the nearest foot. Use only the numbe.

Answer 1

Answer:

Step-by-step explanation:

diameter=18 feet

radius=9feet

circumference=2πr

=2*3.14*9

=56.52 feet square

Answer 2

The circumference of the given circular swimming pool is 56.52 feet i.e.

57 feet when rounded to the nearest integer foot.

Given :

The diameter of the pool = 18 feets

To Find :

The circumference of the pool

Solution :

The pool is circular with a dimension of 18 feet in diameter.

Relation between the Radius and Diameter of a circle :

For a circle with radius 'r' and diameter 'd', the diameter is always twice the radius. So, the relation is :

           $d = 2 * r$

Circumference in terms of diameter :

The circumference or perimeter of any circle with radius 'r' is given as :

               $P = 2\pi r$

Replacing the radius 'r' with its equation with diameter 'd' above :

               $P = 2\pi * (d/2)\\\\P = 2 (1/2)\pi * d\\\\P = \pi d$

So, substituting the value of the given diameter i.e. 18 feet in the above function of circle perimeter :

              $P =\pi d\\\\P = 3.14 * 18\\\\P = 56.52 feet$

Hence, the circumference of the given pool is 56.52 feet.

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