It will take you .4 of an hour or 24 minutes to go 30 miles at 75 mph.
From this formula:
Speed is one of the basic parameter for motion. It is quite different with speed as it is not only covered length or distance. It is a scalar quantity with only magnitude not direction.
It was first discovered by Galileo. He gave the formula and definition of speed that is distance divided time. It can be calculated in terms of constant, angular, instantaneous and average speed.
Speed can be defined as the distance covered by a moving object in unit time taken. Speed is a scalar quantity and hence it can only be represented by magnitude not by direction. In other words, “The speed of an object can also be considered as the magnitude of the velocity of the object”.