state gov Bihar Vidhan Parishad Assistant & DEO Mock Test 2023 Quantitative Aptitude Ratio and Proportion

If (4x + 3y) ∶ (28x - y) = 1 ∶ 5, then what is the value of (3x2 + 4y2) ∶ (7x2 + 2y2) ?

1
8 ∶ 15
2
3 ∶ 5
3
10 ∶ 21
4
7 ∶ 12
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