Question

find the diameter of a circle whose circumference is equal to the sum of circumference of circles with radii 10cm,12cm,18cm​

Answer 1

Answer:

Step-by-step explanation:

2πr = 2πr1+ 2πr2+ 2πr3

2π(r)= 2π(r1+r2+r3)

Cancelling 2π on both LHS AND RHS , we get

r= r1+r2+r3

r= 40 cm

Therefore, diameter = 2r= 2(40 cm) = 80 cm

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Answer 2

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