Question

Find the value of r in π(6+r)^2-πr^2=180π​

Answer 1

Answer:

12

Step-by-step explanation:

π(6+r)^2-πr^2=180π

(6+r)^2 - r^2 =180

(6+r+r)(6+r-r)=180

(6+2r)*6=180

6+2r=30

so, r=12 Ans

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