2006
Mathematics
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In the diagram above, QR is in the diameter of the semicircle QR. Find the areas of the figure to the nearest whole number.
A.
89 cm2
B.
70 cm2
C.
90 cm2
D.
80 cm2
Correct Answer: 90 cm2
Explanation
Area of rectangle PQRS = 10 x 7 = 70 cm2 Area of semi circle QR = Dπ = 7 x 22/7 = 22cm2 ∴Area of the figure = 70 + 22 = 92cm2 = 90cm2
Area of rectangle PQRS = 10 x 7 = 70 cm2 Area of semi circle QR = Dπ = 7 x 22/7 = 22cm2 ∴Area of the figure = 70 + 22 = 92cm2 = 90cm2THIS WEEK's
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