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.
Angle of the sector of circle made by wiper =115∘
Radius of wiper =25 cm
Area of the sector making angle θ
=(θ360∘)×πr2
Area of the sector made by wiper
=(115∘360∘)×πr2 cm2
=2372×227×252
=2372×227×625 cm2
=158125252 cm2
Total area cleaned at each sweep of the blades
=2×158125252 cm2
=158125126=1254.96 cm2