1 Answer

David Carboni · Answer 1 · 2022-05-02T02:34:58+0000

Answer:

Area of the remaining board = 403 cm²

Explanation:

Area of the remaining paper board = Area of the rectangle - Area of the semicircle

Area of the rectangle = Length × Width

= 28 × 20

= 560 cm²

Area of the semicircle =
$(1)/(2)\pi r^(2)$

=
(1)/(2)(3.14)((20)/(2))^2

= 3.14 × 50

= 157 cm²

Area of the remaining board = 560 - 157

= 403 cm²

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