NextMockSearch exams, e.g. SSC CGL, UPPSC, Lekhpal
Railways PYQCBT 1 2016

RRB NTPC · Question 29

The circumference of the four wheels is 16 cm, 24 cm, 32 cm, and 40 cm. They start rotating together. If each wheel covers the same distance, then the distance is A. 480 cm B. 40 cm C. 520 cm D. 560 cm

  1. A

  2. B

  3. C

  4. D

Show answer & explanation

Answer: (A) A

Explanation

The wheels cover the same distance only when each completes a whole number of turns, so the distance is a common multiple of 16, 24, 32 and 40. The least such distance is their LCM, 480 cm.