Q4 of 27 Page 218

Diagram of the adjacent picture frame has outer dimensions28 cm × 24 cm and inner dimensions 20 cm × 16 cm. Find the area of shaded part of frame if width of each section is the same.

We can see that the shaded region represents a trapezium, with the parallel sides are of length 20cm and 28 cm


Height of trapezium = h



As we know that,




⇒ Area = 96 sq.cm


∴ Area of the shaded part is 96 sq. cm


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