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OpenStudy (anonymous):
Two circles have radii in a ratio of 1:2. What is the ratio of their areas? 1:2 1:4 1:8 1:2π 1:4π
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OpenStudy (ghazi):
ratio of area= ratio of radius square= (1/2)^2=1/4
OpenStudy (anonymous):
thnx!
OpenStudy (ghazi):
;)
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