Question

the sum of circumference and the diametre of the circle is 145 cm .what is the length of its circumference

Answer 1

let r be the radius of the circle,
the answer to the question is given in the photo.
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Answer 2

1. Circumference of the circle = 2πr
2. Diameter of the circle = 2r
3. Diameter = 145 cm.
4. Radius = 145/2
5. Radius = 72.5
6. 2πr = 2× 22/7× 72.5
7. = 3190/7
8. =455 cm ².

455 cm ² is the length of the circumference.