A and B are running in the same direction at the speeds of 9km/h and 3km/h, respectively,on a circular track of length 27 km. They will meet again after:
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e 4.5 hours.
Speeds of A = 9 km/h and B = 3 km/h
Track length = 27 km
Relative speed (same direction) = 9 km/h − 3 km/h = 6 km/h
Time to meet again = Track length ÷ Relative speed = 27 ÷ 6 = 4.5 hours