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Railways PYQCBT 1 2016

RRB NTPC · Question 13

Two poles of the height 15 m and 20 m stand vertically upright on a plane ground. If the distance between their feet is 12 m, find the distance between their tops. A. 11 m B. 12 m C. 13 m D. 14 m

  1. A

  2. D

  3. B

  4. C

Show answer & explanation

Answer: (D) C

Explanation

The difference in heights is 20 − 15 = 5 m and the horizontal distance between the feet is 12 m. These form a right triangle whose hypotenuse joins the tops: √(12² + 5²) = √169 = 13 m.