Question

If the circumference is numerically equal to 4 times the area of the circle ,then find the radius of the circle

Answer 1

Answer:

Step-by-step explanation:

2×22/7×r=4×22/7×r²

44/7×r=88/7×r²

R=1/2

Answer 2

Answer:

The radius of the circle is 0.5 units.

Step-by-step explanation:

Let the circumference be c, area be a and radius be r.

Then, c = 2πr and a = πr²

Also, c = 4a

Thus, 2πr = 4πr²

Or, πr = 2πr²

Or, r = 2r²

Or, 1/2 = r²/r

Or, r = 1/2 = 0.5 units

Thus, the radius of the circle is 0.5 units.