Question

the circumference of a circle exceeds the diameter by 30 cm find the radius of the circle.​

Answer 1

Answer:

You got hold of a book and started reading it. It was so interesting that you took whole 4 hours to complete that book. Write a diary entry on the same describing what made you finish the book at one go.

Answer 2

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Let the radius of the circle be r cm.Then,

circumference of the circle=2πr cm

Diameter of the circle=2πr cm

it is given that the circumference of the circle exceeds its diameter by 30 cm.

❣️$2\pi \: r = 2r + 30$

$= 2 \times \frac{22}{7} \times r = 2r + 30 \\ = \frac{44r}{7} = 2r + 30 \\ = \frac{44r}{7} - 2r = 30 \\ = \frac{44r - 14r}{7} = 30 = \frac{30r}{7} = 30 = r = \frac{30 \times 7}</p><p>{30} = 7cm$

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