Ex 12.2

Ex 12.2, 1

Ex 12.2, 2

Ex 12.2, 3 Important

Ex 12.2, 4 Deleted for CBSE Board 2022 Exams

Ex 12.2, 5 Important Deleted for CBSE Board 2022 Exams

Ex 12.2, 6 Deleted for CBSE Board 2022 Exams

Ex 12.2, 7 Important Deleted for CBSE Board 2022 Exams

Ex 12.2, 8 Important

Ex 12.2, 9

Ex 12.2, 10

Ex 12.2, 11 Important You are here

Ex 12.2, 12

Ex 12.2, 13 Important Deleted for CBSE Board 2022 Exams

Ex 12.2, 14 (MCQ)

Last updated at Aug. 5, 2021 by Teachoo

Ex 12.2, 11 A car has two wipers which do not overlap. Each wiper has a blade of length 25 cm sweeping through an angle of 115°. Find the total area cleaned at each sweep of the blades. Radius = r = 25 cm Sweeping angle = 115° Total area cleaned by the two wipers = 2 × Area cleaned by one wiper = 2 × Area of sector with angle 115° = 2 × 𝜃/360×𝜋𝑟2 = 2 × 115/360×22/7×(25)2 = 158125/126 cm2 Hence , Area cleaned by both wiper = 158125/126 cm2