If a : b = 3 : 2 and b : c = 7 : 5, then find a : b : c.
Explanation:
a/b = 3/2 = 21/14 (Multiplying and dividing by 7 to make the value of b same in both ratios)
b/c = 7/5 = 14/10 (Multiplying and dividing by 2 to make the value of b same in both ratios)
a : b : c = 21 : 14 : 10
Hence, option (b).
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