The ratio of the diameters of two circles is 1 : 2. Find the ration of – InterviewSolution

1.

The ratio of the diameters of two circles is 1 : 2. Find the ration of their areas.

Answer»

→ As CIRCUMFERENCE of

circle of RADIUS r =2πr

And as radius =

diameter

⇒ circumference = πd

⇒

πd

2

πd

1

=

d

2

d

1

=

2

1

=1:2

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