Question

If the circumference of a circle is increased from 2pie to 4pie ,its area will be

Answer 1

Step-by-step explanation:

let 1st circle be A ,

so circumference of circle = 2πr = 2π

=> r = 2π/2π

c=> r = 1 unit

Area of circle = πr² = π (1)² = π

let 2nd circle be B,

so circumference of circle = 2πR = 4π

=> R = 4π/2π

=> R = 2

Area of circle = πR²

Area of circle = π(2)²

= 4π (answer)