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$\frac{{(28)}^{2} - {(1.2)}^{2}}{2.8 x 2.8 + 1.2 x 1.2 + 5.6 x 1.2}$ का मान ज्ञात करें –

1
0.5
2
0.25
3
1.6
4
0.4

Answer:- 4

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