Question

Two people are jogging around a circular track in the same direction one person can go to completely around the track in 21 minutes the second person takes 18th if they both start running in the same direction at the same time how long will it take them to be together at this place if they continue to run

Answer 1

n * 21 = m * 18 one runs n laps and one runs m laps to again be together at the same place

7 n = 6 m divide by 3

one runs 7 * 18 = 126 min

the other runs 6 * 21 = 126 min

After 126 min they will be together at the start