Railway Recruitment Board Mathematics — Question 1700
Question
If A : B = 2 : 3 and B : C = 4 : 5, then what is A : B : C?
- 2:3:5
- 8:12:15
- 6:12:15
- 8:12:20
Correct answer
B — 8:12:15
Explanation (English)
Make B common. A:B = 2:3 = 8:12; B:C = 4:5 = 12:15. Therefore A:B:C = 8:12:15.
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