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

Question

asked Apr 15, 2023 176k views

1 Answer

Temuz · Answer 1 · 2023-04-20T10:13:10+0000

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