Question

7. There is a circular path around a sports 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 minutes
will they meet again at the starting point?


this is not my question

my question is why should we have to find LCM in this ​

Answer 1

i had this same doubt........ then i cleared my self

if u take hcf u can find the 1/6 of the distance

if u take lcm u get the correct answer

better u ask ur staff