Question

88. Adjecent diagram is Rectangle PQRS where I (PS) = 1 (QR) = 7 cm. A semicircle with
centre 'C' is drawn as shown. Radius of semi circle is 7 cm. then area of the marked
portion will be = ?
P
7 cm
S
CA
—
7 cm
→ R​

Answer 1

Answer:

21 cm²

Step-by-step explanation:

Area of rectangle = L ×B

Length=7+7 since the Radius is 7 cm and Diameter of circle is equal to length of rectangle =14 cm

Breadth=7cm

So, Area =14×7 = 98 cm²

Now, Area of semicircle= πr²/2

r=7 cm

So, Area = 22/7 ×7×7×1/2 =77 cm²

Area of shaded region = Area of Rectangle - Area of circle

=98 - 77 = 21 cm²

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