Question

An athlete covers $100m$ in $9seconds$. Determine his speed?

Answer 1

Step-1: Given

Distance covered by an athlete, $D=100m$

Time taken by the athlete, $T=9seconds$

Step-2: Formula

$Speed\left(S\right)=\frac{Dis\tan ce\left(D\right)}{Timetaken\left(T\right)}$

Step-3: Calculation for speed of an athlete

$$\begin{gathered} Speed\left(S\right)=\frac{Dis\tan ce\left(D\right)}{Timetaken\left(T\right)} \\ \Rightarrow S=\frac{100m}{9seconds} \\ \Rightarrow S=11.1\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right. \end{gathered}$$

Hence, the speed of an athlete is $11.1\raisebox{1ex}{$m$}\!\left/ \!\raisebox{-1ex}{$s$}\right.$.