Area of Trapezium by Division into Shapes of Known Area
In the given ...
Question
In the given figure, ABCD is a field in the form of a quadrilateral whose sides are indicated. If ∠DAB=90∘ and DC||AB. The area of field is :
A
306m2
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B
307m2
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C
308m2
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D
309m2
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Solution
The correct option is A306m2
Draw the perpendicular CM on AB from C. From the figure, BM =AB –AM =40 -28 =12 m Area of the field =area of rectangle AMCD +area of right angled triangle MBC =28×9+12×12×9=306m2