Exams › SSC CGL (Prelims) › General

If \(A:B = 7:9\), \(B:C = 3:5\), and \(C:D = 8:11\), find \(A:B:C:D\).

1. 56: 72: 120: 165
2. 7: 9: 5: 11
3. 21: 27: 45: 66
4. 189: 243: 405: 528

Correct answer: 56: 72: 120: 165

Solution

Convert the ratios so that common terms are equal. From \(A:B=7:9\) and \(B:C=3:5\), make \(B\) common to get \(A:B:C=21:27:45\). Then combine with \(C:D=8:11\) to obtain the full ratio \(56:72:120:165\).

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