Question

find the area of the shaded regoin where inner circle having its circumference 352m whereas the outer circle having the circumference of 396m

Answer 1

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Answer 2

1.circumference = 2pr = 352m

2 × 22/7 × r = 352

r = 352 ×7/2 ×22 = 56m

2. circumference of other circle = 396

= r = 396 ×7/2 × 22 = 63m

ar (sh) = ar(circle) - ar (other circle )

= pr^2 - pr^2 = 22/7 × 63 ×63 - 22/7 × 56 ×56

= 22 × 63 × 9 - 22 × 56 × 8 = 2618 m^2