Question

8. There is a circular path around a field. Reema takes 22 minutes to complete one round while her friend Saina takes 20 minutes to complete the same. If they both start at the same time and move in the same direction, after how many minutes will they meet again at the starting. ​

Answer 1

Step-by-step explain

The time of their meeting is the LCM of 18 and 12 in minutes.

Prime factorisation of

18=2×3×3Prime factorisation of

12=2×2×3Hence, LCM of

18,12=2×3×3×2=36Sonia and Ravi meet after 36 minutes