Question

The diameter of a circular placemat is 42 centimeters. What is the approximate area of the circular placemat

Answer 1

$area \: of \: a \: circle \: or \: circular \: object \: = \pir^{2} \\ \:$

Answer:

1386cm^2.

Step-by-step explanation:

Radius of a circle = diameter / 2

= 42cm /2

= 21cm.

Area = (3.142 *21*21)cm^2

= 1386cm^2

To convert into metres:

=1386/100

=13.86m^2