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Railways PYQCBT 1 2016

RRB NTPC · Question 11

If (4x + 16) ÷ 4x = 9, then find the value of 5x ÷ [12x^2 + (14/11)x + 2]. A. 29/57 B. 51/111 C. 55/124 D. 68/121

  1. B

  2. C

  3. A

  4. D

Show answer & explanation

Answer: (B) C

Explanation

(4x + 16) = 36x gives x = 1/2. Then 5x = 5/2 and 12x² + (14/11)x + 2 = 3 + 7/11 + 2 = 62/11. (5/2) ÷ (62/11) = 55/124.