(I) A bird can fly 25 km/h. How long does it take to fly 3.5 km?
The speed of the bird is 25 km/h. The bird flies 3.5km at this speed . We will find time for the bird to fly this distance.
Let`s think the bird is flying all in the same direction and along a straight path. So distance-displacement and speed-velocity are the same.
(the time when the motion starts)