If a : b = 5 : 4 and b : c = 6 : 11, what is the value of (2a + 2c) : (2b - a)?
Explanation:
Given, a : b = 5 : 4 and b : c = 6 : 11
∴ a : b : c = 5 × 3 : 12 : 11 × 2 = 15 : 12 : 22
⇒ 2a+2c2b-a = 30x+44x24x-15x = 749
Hence, option (b).
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