Question

Arjun, Bineet and Karan start at the same time in the same direction to run around a circular stadium. Arjun completes a round in 252 seconds, Bineet in 308 seconds and Karan in 198 seconds, all starting at the same point. After what approximate time will they again at the starting point?

• A. 160 minutes
• B. 180 minutes
• C. 200 minutes
• D. 210 minutes

Answer 1

The correct option is B 180 minutes

Time taken by Arjun = 252 sec
Time taken by Bineet = 308sec
Time taken by Karan = 198 sec
So, L.C.M. of (252, 308, 198) = 11088 sec
No. required time in minutes = $\frac{11088}{60}$ minutes = 184.8 minutes
So, approx. time is 180 minutes.