A) 25:16
B) 5:4
C) 4:5
D) 3:5
Correct Answer: C
Solution :
We have, \[\frac{a}{b}\] \[\frac{c}{d}=\frac{L.C.M.(a,c)}{H.C.F.(b,d)}\] \[\Rightarrow \]The ratio of circumferences is 4 : 5.
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