Question

the circumference of a circle is 220 Find its radius and its area​

Answer 1

Answer:

=> r = 35units.

=> Area = 3850 square units.

Step-by-step explanation:

Circumference = 2πr

=> 220 = 2 * 22/7 * r

=> r = (220*7) / (22*2)

=> r = 35units.

Area = $. πr^{2}$

=> Area = 22/7 * 35 *35

=> Area = 22*5*35

=> Area = 3850 square units.

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Answer 2

Answer:

circumference = 2πr

we know that ,

the circumference is 220,then

= 2×22/7 × r =220

22/7 × r = 220 × 2

22/7 × r = 440

22 × r = 440 × 7

22 × r = 3080

r = 3080 ÷ 22

r = 140.

And,

Area of circle = πr^2

= 22/7 × (140)^2

= 22/7 × 140 × 140

= 22 × 20 × 140

=61,600.

Therefore, radius = 140 and area = 61,600.