Question

The perimeter of a circle is doubled, how many times does its area become? ( A ) no change ( B ) 4 ( C ) 2 ( D ) 1/2

Answer 1

Answer:

(B) 4

Step-by-step explanation:

A1 = π r²

A2 = π [2r]² = 4 π r²

A2 = 4 A1

Answer 2

Answer:

(B) 4

Step-by-step explanation:

When perimeter of circle is doubled it means it's radius is doubled...

Again when we find its area, we use square of radius... so square if 2 is 4.