Ali and Badal start from the same position and at the same time in a 1200 m circular race, with speeds of 27 km/h and 45 km/h, respectively. Find after how much time they will meet again on the track for the first time when they are both running in the same direction.
Answer & explanation
Correct answer: option 2
Relative speed (when both moves in same direction ) = 45 - 27 = 18 km/h
18 km/h = 18 × \(\frac{5}{18}\) m/sec = 5 m/sec
Time taken by them to meet each other = \(\frac{1200}{5}\)
= 240 seconds