Calculate the area of a circular ring, whose internal and external radii are 3 cm and 10 cm respectively.

Charanjeet Kaur asked Apr 9, 2023

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4 votes

Charanjeet Kaur asked Apr 9, 2023

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22 votes

Explanation:

area of circle = πr²

internal radii - 3 cm = r1

external radii - 10 cm = r2

internal + external radii = πr1² + πr2²

= 22/7×3² + 22/7×10²

= 28.28 + 314.28

= 342.56 cm²

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