Three men start together to travel the same way around a circular track of 11 kilometers in circumference. Their speeds are 4, 5 and 8 kilometers per hour respectively. When will they meet at a starting point?
Q1. Three men start together to travel the same way around a circular track of 11 kilometers in circumference. Their speeds are 4, 5 and 8 kilometers per hour respectively. When will they meet at a starting point?
Answer: 11 hours
Explanation: Time to complete one lap: 11/4, 11/5, 11/8 hours; LCM of 11/4, 11/5, 11/8 = 11×LCM(1)/GCD(4,5,8) = 11/1 = 11 hours.