Multiple choice

A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they come around again at the starting point?

  1. 26 minutes and 18 seconds

  2. 42 minutes and 36 seconds

  3. 45 minutes

  4. 46 minutes and 12 seconds

  5. 46 minutes and 2 seconds
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

LCM of 252, 308 and 198 = 2772 So, A, B and C will again meet at the starting point in 2772 sec, i.e. 46 minutes and 12 seconds.

Keep practicing — related questions