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प्रश्न
The diagram represents the area swept by wiper of a car. With the dimension given in figure, calculate the shaded swept by the wiper.
बेरीज
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उत्तर
Area of shaded portion = `theta/360° xx π ( 21^2 - 7^2)` cm2
Area of shaded portion = `(30°)/360° xx 22/7 xx ( 21^2 - 7^2)` cm2
Area of shaded portion = `22/(12 xx 7) xx 392` cm2
Area of shaded portion = 102.67 cm2
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