In order to cover a certain distance in a shorter time span, the object should have a greater _________.
speed
We know that:
Speed=DistanceTime
Here, the object has to cover a certain fixed distance in a shorter span of time.
From the equation above, we understand that greater the speed, lesser is the time taken, provided the distance is constant.
So, in order to cover a certain distance in a shorter time span, the object should have a greater speed.