Question

Ratio of area of a circle to its perimeter is 3 : 1. What is the length of the circle (in units) ?​

Answer 1

Answer:

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Step-by-step explanation:

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Answer 2

Answer:

D=12(in units)

Step-by-step explanation:

area of the circle= πr^2

circumference of the circle= 2πr

w.k.t,

a=3,c=1,

then, 3/1 = πr^2/2πr

π and π will be canceled,

3/1 = r^2/2r

cross multiple,

6r = r^2

6 = r^2/r

6 = r

there fore

r = 6

d = 2r

d = 2(6)

d = 12