Question

the areas of two concentric circles are 962.5cm2 and 1386cm2. find the width of the ring formed by them

Answer 1

Answer:

3.5cm

Step-by-step explanation:

πR^2=1386 So R=21cm πr^2=962.5 So r=17.5cm Thus width of ring = 21-17.5=3.5cm

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