a car has two wipers which do not overlap each wiper has a blade of length 21 CM sweeping through an angle 120 degree find the total area cleaned at each sweep of The Blades take π =22/7
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924 cm²
Step-by-step explanation:
The area of the sector = Ф/360πr²
Where Ф is the angle subtended at the center of the circle and in this case the angle through which the blade sweeps.
The length of the blade is the radius of the sector.
Given that the blades are equal in length the area swept is equal for the two blades.
Area swept = 120/360 × 21² × 22/7 = 462 cm²
For the two blades we have :
2 × 462 = 924 cm²
The area swept is thus :
924 cm²
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