passpadi

2006

Mathematics

JAMB

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 = 90cm2
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