Question

12. The shaded portion of the given
figure represents. The area swept
by a wiper of car, calculate the
area swept by the wiper if
OA = 7 cm. and AB = 21 cm.
(use =π=22/7​

Answer 1

Answer:

102.66

Step-by-step explanation:

Area of shaded portion

= ∠AOD/360˚ × π[(21)2 – (7)2] cm2

= 30˚/360 × 22/7 × [(21)2 – (7)2] cm2

= 12 × 22/7 × [(441 – 491)] cm2

= 22/84 × 392 cm2

= 102.66 cm2

hope it helps ♤