On a 2200 m long circular track, Sarita and Kavita drove their cycles from the same point but in opposite directions with the speeds 20 km/hr and 16 km/hr, respectively. After how much time will they meet again for the first time?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 3 minutes 40 seconds.
Sarita's speed = 20 km/hr = 20 × (5/18) m/s = 50/9 m/s
Kavita's speed = 16 km/hr = 16 × (5/18) = 40/9 m/s
Relative speed = (50/9) + (40/9) = 10 m/s
Time required = 2200/10 = 220 seconds = 3 minutes and 40 seconds
Therefore, they will meet again for the first time after 3 minutes and 40 seconds.