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The ratio of the area of a circle, P , to the area of another circle, Q , is 16/81 . If the radius of circle P is 8 units, what is the radius of circle Q ?

The ratio of the area of a circle, P , to the area of another circle, Q , is 16/81 . If the radius of circle P is 8 units, what is the radius of circle Q ?
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3 votes
The ratio of the area of a circle, P , to the area of another circle, Q , is 16/81 .

If the radius of circle P is 8 units, what is the radius of circle Q ?

asked
User Ank
by
8.2k points

1 Answer

3 votes
ratio of the radii = sqrt16 / sqrt81 = 4/9

so radius of circle Q is found by solving 4/9 = 8/x where x = radius of Q

x = 2*9 = 18

radius of circle Q = 18.
answered
User Abhinsit
by
7.7k points
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