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Railways PYQCBT 1 2016

RRB NTPC · Question 60

A triangle has a perimeter of 200. If two of its sides are equal and the third side is 20 more than the equal sides, what is the length of the third side? A. 60 B. 50 C. 80 D. 70

  1. A

  2. C

  3. D

  4. B

Show answer & explanation

Answer: (B) C

Explanation

Let each equal side be x, so the third side is x + 20. Perimeter = x + x + x + 20 = 3x + 20 = 200, so x = 60. The third side = 60 + 20 = 80.