NDA 2025 · PYQ · Hyperbola · easy
What is the distance between the two foci of the hyperbola 25x² - 75y² = 225?
- A.2√3 units
- B.4√3 units✓ Correct
- C.√6 units
- D.2√6 units
Dividing by 225: x²/9 - y²/3 = 1. So a² = 9, b² = 3. c² = a² + b² = 12, c = 2√3. Distance between foci = 2c = 4√3.
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