The areas of two circles are in the ratio of 77 : 7. Find the ratio of their radii
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Answer:
Area 1 = 77
2πr = 77
2 × 22/7 × r1 = 77
2 × 2/7 ×r1 = 7
4 × r1 = 49
r1 = 49/4
similarly,
r2 = 49/44
ratio of their radii = r1/r2
= 49×44/49×4
=11 : 1
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