Railways PYQCBT 1 2016

RRB NTPC · Question 95

The area of a square ground is 313600 square meters.. How long will it take for a woman to cross the field diagonally (diagonally) at the rate of \(4\sqrt 2\) m/s? A. 3 minutes B. 2 minutes 20 seconds C. 2 minutes 40 seconds D. 3 minutes 10 seconds

  1. B

  2. A

  3. C

  4. D

Show answer & explanation

Answer: (A) B

Explanation

Side = √313600 = 560 m, so the diagonal = 560√2 m. Time = 560√2 / 4√2 = 140 s = 2 min 20 s.