30. In the given figure, ABCD is a rectangle of dimensions 21 cm 14 cm. A semicircle is drawn with BC as
diameter. Find the area and the perimeter of the shaded region in the figure.
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this is your solution okkkkkkkkkk
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RaahiRamdev:
second part is incorrect
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Answer:
perimeter=78cm and area=217cm^2
Step-by-step explanation:
Area of shaded region = Area of rectangle - Area of semi-circle
= (21 × 14) – ½ × π × 7 × 7
= 294 – 77
= 217 cm2
Perimeter of shaded region = 21 + 14 + 21 + π × 7
= 56 + 22
= 78 cm
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