The ratio

The ratio of the lengths of the two circles is 5:2. Find the ratio of a
a) the radii of these circles
b) the areas for these circles

Correct answer:

a =  5:2
b =  25:4

Step-by-step explanation:

o1:o2=5:2  o = 2 π r = π D π D1 : π D2  = 5:2  a=5/2=2.5=5:2
2 π r1 : 2 π r2 = 5:2 r1 : r2 = 5:2 = 25 = 5/2  S = π r2  b = S2S1 =  π r22π r12   b = r2r1   r2r1  b=25 25=2 25 5=425=641=6.25=25:4



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Showing 1 comment:
Math student
Can we take pictures of the problem





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