Question

1. Find the area of the shaded region.
-- 30 cm -
(a) 21 cm
30 cm​

Answer 1

Answer:

81 cm is shaded reagion

Answer 2

Answer:

area of shaded region = area of rectangle - area of semicircle.

Step-by-step explanation:

area of rectangle = L×B

= 30× 21

= 630 cm sq.

area of semicircle = π×r×r/2

= ( 22/7×21/2×21/2 ) /2

= ( 11/7×21×21/2 ) /2

= ( 11/7×21×21/2 ) ×2/1

= 11/7×21×21/2×2

=. 11/7×21×21

=. 11×3×21

=. 33×21

=. 693 cm sq.

area of shaded region = 63 cm sq.

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