Question:
OPQRS is a part of a circle of diameter 40 cm. OPQR and OQRS are semi-circles. The area of the shaded part OQR is 420 cm² and the perimeter of the shaded part OQR is 78 cm
(a) Find the area of the figure OPQRS.
(b) Find the perimeter of the figure OPQRS.
Take π = 3.14.
Solution:
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