Question

The diameters of two silver discs are in the ratio 2:3. What will be the ratio of their areas?​

Answer 1

Answer:

Which of the following can not be a part of the various reasons given for the decline of Indus Valley Civilisation? *

1 point

good roads

natural calamities

change in course of a river

loss of fertile soils

Answer 2

Answer:

4:9

Step-by-step explanation:

Ratio of the diameters = 2:3 Let the diameters be 2x and 3x. Radii of the discs = 2x/2 and 3x/2 = x and 3x/2

Ratio of the area of the discs = (πx2) / (π)(3x/2)2

= (πx2) / (π)(3x/2)2

= 4x2 / 9x2 = 4/9 = 4 : 9

Therefore, ratio of the areas of the discs = 4 : 9.

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