Question

There is a circular path around a sport field. sonia takes 18 minutes to drive one round of the field, while ravi takes 12 minutes for the same. Suppose they both start at the same point and at the same time and go in the same direction. After how many times will they meet again at the starting point?

Answer 1

Step-by-step explanation:

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

Prime factorisation of 18=2×3×3

Prime factorisation of 12=2×2×3

Hence, LCM of 18,12=2×3×3×2=36

Sonia and Ravi meet after 36 minutes.