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25/06/2021 1:13 pm
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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.
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25/06/2021 1:15 pm
Given, Radius (r) = 25 cm
Sector angle (θ) = 115°
Since there are 2 blades,
The total area of the sector made by wiper = 2 × (θ/360°) × π r2
= 2 × (115/360) × (22/7) × 252
= 2 × 158125/252 cm2
= \(\frac{158125}{126}\) = 1254.96 cm2