Question

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

Answer 1

Answer:

r = (C - 30)/15

Step-by-step explanation:

let the circumference be C and diameter be d and Radius be r,

By Condition,

C = d + 30

since d = 2r

Therefore, C = 2r + 30

C = 2 (r + 15)

C/2 = r + 15

r = C/2 - 15

r = (C - 30)/15

Answer 2

Answer:7

Step-by-step explanation:

Circumference=πd=d+30

22d/7=d+30

22d=7d+210

15d=210

d=210/15=14

d=14so r=7