Question

there is a Circular path around a spprts field . Sonia takes 18 minutes to drive one around 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 same direction . How many minutes will they meet again at the starting points ?​

Answer 1

Sonia takes 18 min

Ravi takes 12min

They met after =L.C.M.(18,12)

L.C.M.=2power 2 × 3power2

=4×9

=36min

Answer 2

sonia takes to complete a round = 18 minutes

ravi takes to compelete a round = 12minutes

They will be meet again after LCM of both values at the starting point. 

   sonia = 18= 2*3*3

ravi = 12= 2*2*3

Lcm = 2*2*3*3

         =36 minutes. 

hope it helps