Answer:

Speed = Distance / Time

For Bus A:

Speed = 25 km / 70 mins = 0.357 km/min

For Bus B:

Speed = 25 km / 65 mins = 0.385 km/min

For Bus C:

Speed = 25 km / 60 mins = 0.417 km/min

Therefore, the speed of Bus A is 0.357 km/min, the speed of Bus B is 0.385 km/min, and the speed of Bus C is 0.417 km/min.

Explanation: