Question

what is the formula of variable speed​

Answer 1

Variable speed: A object is said to be in variable speed when the object covers a different distance at equal intervals of times. ... Instantaneous speed: When an object is moving with variable speed, then the speed of that object at any instant of time is known as instantaneous speed.

What is the formula of speed?

The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time.