Question on: WAEC Mathematics - 2009
PQRS is a trapezium. QR//PS, /PQ/ = 5cm, /OR/ = 6cm, /PS/ = 10cm and angle QPS = 42o. Calculate, correct to the nearest cm2, the area of the trapezium (h = 3.35cm2 )
A
27cm2
B
30cm2
C
36cm2
D
37cm2
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Correct Option: A
Area = (\frac{1}{2}(a + b))h
where a = QR = 6cm
b = PA = 10cm
Area = (\frac{1}{2}(6 + 10)) x 3.35cm2
= (\frac{1}{2}(16)) x 3.35cm2
= 26.8cm2
= 27cm2 (approx.)
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