Question

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

Answer 1

let radius of circle be r cm
2*22/7*r=(15*7/2*22)+(18*7/2*23)
or 44*7*r=7/2*223(18+15)
or,r=18+15=33
so radius of a circle is 33cm

Answer 2

Answer:

Step-by-step explanation:

thanks