Convertion of units: speed of a car (3600)

, por F_y_Q

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A car is moving in a straight path at 3 600 meters during 90 seconds. Determine the speed of the car, expressed in km/h.

P.-S.

We are going to use velocity’s equation and two conversion factors:

v = \frac{d}{t} = \frac{3\ 600\ \cancel{m}}{90\ \cancel{s}}\cdot \frac{1\ km}{1\ 000\ \cancel{m}}\cdot \frac{3\ 600\ \cancel{s}}{1\ h} = \fbox{\color[RGB]{192,0,0}{\bm{144\ \frac{km}{h}}}}