Diagram of the adjacent picture frame has outer dimensions = 24 cm x 28 cm and inner dimensions 16 cm x 20 cm. Find the area of each section of the frame, if the width of each section is same.

Here two of given figures (I) and (II) are similar in
dimensions.
And also figures (III) and (IV) are similar in dimensions.
∴ Area of figure (I) = Area of trapezium = 1/2(a+b)xh
= 1/2(28+20)x4=1/2x48x4=96cm²
Also Area of figure (II) = 96cm²
Now Area of figure (III) = Area of trapezium = 1/2(a+b)xh
= 1/2(24+16)x4=1/2x40x4=80cm²
Also Area of figure (IV) = 80 cm²

Class 8 Maths Chapter 11 Exercise 11.2 Solution in Video

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