Question

two buses have the same velocity if they move...
at the same speed in opposite directions.
at the same speed in the same direction.
around a curve at different accelerations.
around a curve at different speeds.

Explanation:

Velocity is a vector quantity having both magnitude (speed) and direction. For two objects to have the same velocity, both their speed and direction must be the same.

Answer:

at the same speed in the same direction.