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In the diagram above QR is in the diameter of t... - JAMB Mathematics 2006 Question

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 option: c

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

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