Question

Find radius of a circle whose circumference is equal to sum of circumferences of two circle of radii 15cm and 18cm

Answer 1

circumference of circle = 2 pi r
circumference of circle c1 = 2x pi x 15 = 30 pi

circumference of circle c2 = 2x pi x 18 = 36 pi


sum of circumference = c1+c2
=66 pi

let R be the radius of large circle

so circumference of large circle = 2 pi R

2 pi R = 66 pi [given]

R= 33

Radius of the circle = 33

Answer 2

Answer:

Step-by-step explanation:

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