Mensuration Practice Test 1

Question : 37 of 40

Marks: +1, -0

The circumferences of two circles are in the ratio 2 : 3. What is the ratio of their areas?

Solution:

Circumference of two circles =

{2πr}/{2πR}

2/3

r/R

2/3

Area of two circles =

{πr^2}/{πR^2}

2/3

4/9

r = 4 : 9

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