Answer:
t = distance ÷ speed
t = 1000 cm ÷ 40 cm/s
t = 25 s
So it would take 25 seconds to cover a distance of 1000 cm at a speed of 40 cm/s. It's important to note that the units of distance and speed must be the same in order for the calculation to be correct. Also, this is a basic equation which is based on the distance-time-speed relationship. This equation can be used for various other calculations and can be helpful in determining the time required to reach a certain distance at a certain speed.