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A car has two wipers which do not overlap. Each wiper has a blade of length sweeping through an angle of .find the total area cleaned at each sweep of the blades.

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answer is A.

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Detailed Solution

Area of the sector

Since there are two wipers of the car which means they will be swiping twice the area of a sector so we multiply the area of sector by 2
Therefore, the total area swept by the blades will be

Now substituting the value of radius of wiper and angle made by the wiper

On solving we get

Therefore, the total area swept by the pair of wipers will be

So, option 1 is correct.

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