Arithmeticmedium · Past Paper
If $a:b = 2:3$ and $b:c = 4:5$, then $a:b:c$ is:
A8:12:15
B2:4:5
C8:10:15
D4:6:15
✓ Correct Answer: A — 8:12:15
Multiply first ratio by 4 and second by 3 to make 'b' common: 8:12 and 12:15. So a:b:c = 8:12:15.
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