Question

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Answer 1

(a)

r=3.5m

area of the shaded portion

1/4. 22/7. 3.5 3.5

=(22×3.5×0.5)/4

=(11×3.5)/4

=38.5/4

=9.62m²

(b)

r=7m

area of the shaded portion is

1/2. 22/7 .7. 7

=(22.7)/2

=11.7

=77m²

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