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Railways PYQCBT 1 2020

RRB NTPC · Question 78

In ΔABC, ∠A = 90°, AB = 6 cm and AC = 8 cm. If AD is perpendicular to BC, the AD is equal to:

  1. 3.8 cm

  2. 4.4 cm

  3. 4.8 cm

  4. 4.6 cm

Show answer & explanation

Answer: (C) 4.8 cm

Explanation

BC = √(6² + 8²) = 10 cm. The altitude to the hypotenuse = AB × AC/BC = 48/10 = 4.8 cm.