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30. In Figure 5, PQRS is square lawn with side PQ 42 metres. Two circular flower beds arethere on the sides PS and QR with centre at 0, the intersections of its diagonals. Find thetotal area of the two flower beds (shaded parts). |
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Answer» Here is your answer, According to the question, each side of PQRS must be 42m as PQRS is a square.There are two semi circles on two sides of the square.So, the semi circle's diameter = the side of the square = 42mradius = 42/2 = 21m as we know the formula forarea of semi circle = Πr²where, Π = 22/7 area = 22/7 × (21)²= 22/7 × 21 × 21= 22 × 3 × 21= 1386m² so this is the area of bed of one side,total area of beds = 2×1386 = 2772m² Hence, the total area of beds is 2772m². |
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