Q11 of 34 Page 177

Diagram of the adjacent picture frame has outer dimensions =24 cm × 28 cm and inner dimensions 16 cm × 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) h


= 1/2 (28 + 20) × 4


= 96 cm2


Also Area of figure (II) = 96 cm2


Now Area of figure (III)


= Area of trapezium = = 1/2 (24 + 16) × 4


= 80 cm2


Also Area of figure (IV) = 80 cm2


More from this chapter

All 34 →
9

Top surface of a raised platform is in the shape of a regular octagon as shown in the figure. Find the area of the octagonal surface.

 10

There is a pentagonal shaped park as shown in the figure. For finding its area Jyoti and Kavita divided it in two different ways. Find the area of this park using both ways. Can you suggest some other way of finding its area?

 1

There are two cuboidal boxes as shown in the adjoining figure. Which box requires the lesser amount of material to make?

 2

A suitcase with measures 80 cm × 48 cm × 24 cm is to be covered with a tarpaulin cloth. How many metres of tarpaulin of width 96 cm is required to cover 100 such suitcases?