Question

Moving along a circular path, Ansh takes 18 minutes to complete one round and Siddhi takes 12 minutes for the same. If they start from the same point and at the same time, then after what time they will meet again at the starting point?
1. 36 minutes
2. 1.5 minutes
3. 6 minutes
4. 216 minutes

Answer 1

Correct Answer - Option 1 : 36 minutes

Given:

Time to complete one round by Ansh = 18 min

Time to complete one round by Siddhi = 12 min

Calculation:

To get the LCM we have to factorize the numbers

Factor of 18 = 2 × 3 × 3

Factor of 12 = 2 × 2 × 2

LCM = 2 × 2 × 3 × 3 = 36 

∴ They will meet again at the starting point after 36 minutes