1.

If X/Y = 12/9, then find the value of (X2 + Y2)/(X2 – Y2)?1. 163/352. 246/333. 125/284. 225/63

Answer» Correct Answer - Option 4 : 225/63

Given:

X/Y = 12/9

Calculations:

Let the value of X be 12k and the value of Y be 9k, where k is constant.

(X2 + Y2)/(X2 – Y2)

⇒ k2(122 + 92)/k2(122 – 92)

⇒ (144 + 81)/(144 - 81)

⇒ 225/63

(X2 + Y2)/(X2 – Y2) is 225/63 



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