Question

a dinner plate form a circle a circular region form a beautiful design the inner circumference 352 and the other is 396mm find the width of circular plate
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Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Let R be radius of outer circle and r be radius of inner circle,

It has been given that 352mm is the circumference of inner circle,

⇒2πR=352mm

⇒2×722×r=352mm

⇒r=2×22352×7=442464=56mm

In addition 396mm is the circumference of outer circle,

⇒2πR=396mm

⇒2×722×R=396mm

⇒R=2×22396×7=63mm

 Therefore, widih of circular design =R−r=63−56=7mm