Question

ABCD represent a flower bed. if OA = 28m and OD = 21m , find
(a) the area of the bed,
(b) the perimeter of the bed.​

Answer 1

Answer:

a=32

B=18...............

Answer 2

area=269.5 sq. units

perimeter = 11

Explanation:

Area of shaded portion = 1/4 * pi *(R^2-r^2)

=1/4* 22/7 * {(28)^2-(21)^2} =1/4* 22/7 * 343

=1/4 *22*49 =269.5 sq. units

perimeter = 1/4 *2*pi*(R-r) = 1/2 * 22/7* 7 = 11 units

• Hope it will help you.