Question

Express the speed of $100km/hr$ in $cm/s$.

Answer 1

Step 1: Given data

Speed in $km/hr$=$100km/hr$

Step 2: Solution

We know that $1km=1000m$ and $1m=100cm$, thus $1km$ will be equal to ${10}^{5}cm$.

We also know that $1hr=60min$ and $1min=60sec$, thus $1hr=60\times 60sec$ or $1hr=3600sec$.

Now let us convert $100km/hr$ in $cm/s$ with the help of the above-mentioned information:

$$\begin{gathered} 100km/hr=100\times \left(\frac{{10}^5}{3600}\right)cm/s \\ 100km/hr=2777.78cm/s \end{gathered}$$

Thus, the speed in $cm/s$ will be $2777.78cm/s$.