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in Commercial Mathematics by (36.7k points)
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A : B = 5 : 8 and B : C = 18 : 25 then A : C = ……………… 

A) 2 : 9 

B) 9 : 20 

C) 1 : 10 

D) 16 : 5

2 Answers

+1 vote
by (57.0k points)
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Best answer

Correct option is (B) 9 : 20

A : B = 5 : 8 and B : C = 18 : 25

A : C = \(\frac{A:B}{C:B}=\frac{5:8}{25:18}\)

\(=\frac58\times\frac{18}{25}\) \(=\frac{18}{8\times5}\)

\(=\frac9{4\times5}\) \(=\frac9{20}\)

= 9 : 20

Thus, A : C = 9 : 20

+1 vote
by (38.9k points)

Correct option is  B) 9 : 20

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