Answer:
Displacement:
Displacement is needed to find the final position of an object; it tells not only the distance from the starting position, but also the net direction of travel.
Velocity:
Well, one primary place to use velocity is in navigation. Aircraft and ships not only need to know their speed but also their direction. An airplane, for example, has an airspeed but also a different ground speed. To get to its destination, the ground speed is important but the wind is a vector component which must be added to the course flown.
Distance:
The real-life examples of distance formula are as follows, Navigation of objects underwater. The pilot uses the distance formula to estimate the distance between other planes. To find the length of solids.
Explaination: You can summarise it if you want.
