Find the diameter of a circle whose circumference is equal to the some of circumference of circle with radii 10 cm,12 cm,and 18 cm
Let d be the required diameter, then radius of the circle d2
It is given that,
2πd2=2π(10)+2π(12)+2π(18)
⇒2π(d2)=2π(10+12+18)
⇒d2=40
⇒d=80 cm.