Question

If the curcumferencefacirdis greater than's
diameten by 18cm then find the radiw of the
arch​

Answer 1

Correct Question:

If the circumference of a circle is greater than its diameter by 18 cm then find the radius of the circle

Answer:

4.2 cm

Given:

• Circumference exceeds diameter by 18cm.

To Find:

• The radius of the circle.

Solution:

Let the radius of the circle = r

Circumference = 2πr

Diameter = 2r

According to the question:

⟹ 2πr = 2r + 18

⟹ 2πr - 2r = 18

⟹ 2r ( π - 1 ) = 18

⟹ 2r ( 3.14 - 1 ) = 18

⟹ 2r ( 2.14 ) = 18

⟹ 2r = 18/ 2.14

⟹ 2r = 8.4

⟹ r = 8.4/2

⟹ r = 4.2

Radius of the circle is 4.2 cm