Railway Recruitment Board Mathematics — Question 653
Question
If a:b = 2:3 and b:c = 4:5, find a:b:c
- 8:12:15
- 6:9:12
- 4:6:7
- 2:3:4
Correct answer
A — 8:12:15
Explanation (English)
Make b equal: a:b = 8:12 (multiply by 4), b:c = 12:15 (multiply by 3). So a:b:c = 8:12:15
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