Question

……… is the total distance travelled by an object in unit time.

Answer 1

1. The distance travelled by a body in unit time is called speed.
2. It is measured in$\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$.
3. The ratio of distance to time is called speed.

$$\begin{gathered} Speed=\frac{dis\tan ce}{time} \\ time=1sec \\ Speed=\frac{dis\tan ce}{1sec} \\ Speed=dis\tan ce \end{gathered}$$

Hence, speed is the total distance travelled by an object in unit time.