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# A car moves with a speed of 80 km/hr. What is the speed of the car in meters per second?${\text{A}}{\text{. }}22\dfrac{2}{9}m/s \\ {\text{B}}{\text{. }}8m/s \\ {\text{C}}{\text{. }}20\dfrac{1}{9}m/s \\ {\text{D}}{\text{. }}8\dfrac{2}{3}m/s \\$

Last updated date: 11th Aug 2024
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Hint: Here we go through by converting the kilometer into meter and hour to second to convert the speed from km/hr. to m/s.

Therefore we can say that 1 hour=$60 \times 60 = 3600s$
We will write 80km/hr. as$\dfrac{{80km}}{{1hour}}$.
$\Rightarrow \dfrac{{80km}}{{1hour}} = \dfrac{{80 \times 1000m}}{{1 \times 3600s}} = \dfrac{{80}}{1} \times \dfrac{5}{{18}} = \dfrac{{200}}{9} = 22\dfrac{2}{9}m/s$
Note: Whenever we face such a type of question the key concept for solving the question is to convert the data one by one in which the question asked the result. And for this question we will apply a short trick after solving we will get that short trick that we have to simply multiply by $\dfrac{5}{{18}}$ to convert km/hr. to m/s. and vice versa we will multiply by $\dfrac{{18}}{5}$ to convert from m/s to km/hr.