Find the area (in cm2) and the diameter (in cm), respectively, of a circle whose circumference is 40π cm?

400π and 40 40 and 400π 400 and 40 40 and 400

400π and 40

We know that, Circumference of circle =2πr Area of circle=πr² Given, The circumference of the circle is 40 π cm So,  2πr = 40π = r = 20 Diameter of circle = 2r = 40cm Area of circle = π r² = π × (20 × 20) = 400π