Three boys runs around a circular track and takes 20 min, 25 min and 30 min respectively to complete the one round. When do they all come relatively to the same position as at a certain point of time in their path?
∴ Required time = LCM of (20, 25 and30) = 300 min Hence, after 300 min they all come relatively to the same position as at a certain point of time in their path.
