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43.5 : 25 is the same as

(a) 4 : 1 

(b) 2 : 1 

(c) 7 : 5 

(d) 7 : 10

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(a) 4 : 1

43.5 : 25 = (22)3.5 : 25 = 27 : 25 

= \(\frac{2^7}{2^5}\) : 1 = 27–5 : 1 = 22 : 1 = 4 : 1.

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