In a circular race of 4800 meters, A and B start from the same point and at the same time with speeds of 36 km/h and 54 km/h respectively. When will they meet again for the first time on the track if they are running in opposite directions?

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Step 1: Convert speeds from km/h to m/s.
- Speed of A = 36 km/h = (36 * 1000) / 3600 = 10 m/s  
- Speed of B = 54 km/h = (54 * 1000) / 3600 = 15 m/s

Step 2: Since A and B are running in opposite directions, their relative speed = 10 + 15 = 25 m/s.

Step 3: The length of the circular track = 4800 m.

Step 4: Time taken to meet for the first time = Distance / Relative Speed = 4800 / 25 = 192 seconds.

Therefore, A and B will meet again for the first time after 192 seconds.

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