Q74 of 89 Page 120

In Fig. 8.6 (i) and Fig. 8.6 (ii), find the ratio of the area of the shaded portion to that of the whole figure:


From fig (i)

Area of shaded portion = 8 sq. unit


Area of whole figure = 16 sq. unit


Ratio of area of shaded portion to whole figure =


Ratio = 1:2


From figure (ii)


Area of shaded portion = 8 sq. unit


Area of whole figure = 16 sq. unit


Ratio of area of shaded portion to whole figure =


Ratio = 1:2


More from this chapter

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72

In the following figure, each division represents 1cm:


Express numerically the ratios of the following distances:


(i) AC : AF (ii) AG : AD


(iii) BF : AI (iv) CE : DI

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Find two numbers whose sum is 100 and whose ratio is 9 :16.

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A typist has to type a manuscript of 40 pages. She has typed 30 pages of the manuscript. What is the ratio of the number of pages typed to the number of pages left?

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In a floral design made from tiles each of dimensions 40cm by 60cm (See Fig. 8.7), find the ratios of:

a) the perimeter of shaded portion to the perimeter of the whole design.


b) the area of the shaded portion to the area of the unshaded portion.