The areas of two concentric circles are 962.5 cm² and 1386 cm² respectively. Find the width of the ring.
Mensuration
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Question

The areas of two concentric circles are 962.5 cm2 and 1386 cm2 respectively. Find the width of the ring.

KnowledgeBoat · Accepted Answer

Let radius of smaller circle be r cm and radius of bigger circle be R cm. Given Area of smaller circle = 962.5 cm2 Area of bigger circle = 1386 cm2 Width of ring = R − r Area of bigger circle = πR2 Calculating the area of smaller circle, Width of the ring = R - r = 21 - 17.5 = 3.5 cm. Hence, width of the ring = 3.5 cm.

Mathematics

The areas of two concentric circles are 962.5 cm² and 1386 cm² respectively. Find the width of the ring.

Mensuration

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