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Two walls of a house have windows one each ofthe shape of a rectangle, having a semicircle onthe top. The rectangular part is 1.2 m long and4.2 cm wide. From how much area the air cancome in the room? |
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Answer» Consider one window:area of a rectangle = length x widthArea = 1.2 x 4.2 = 5.04 m^2area of semicircle = (pi x radius^2)/2Area = (pi x 2.1^2)/2 = 6.93 m^2 (2 decimal places)Total area = 5.04 + 6.93 = 11.97 m^22 windows = 2 x 11.97 m^2= 23.94 m^2 |
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