Question

The car transports 180 m in 12 s. Calculate its speed and express it in m / s and in km / h

Answer 1

Explanation:

Given parameters:

Distance  = 180m

Time  = 12s

Unknown:

Speed  in m/s and km/hr

Solution:

Speed is the distance divided by the time taken,

   Speed  = $\frac{distance}{time}$  

So;

     Speed  = $\frac{180}{12}$   = 15m/s

   1000m = 1km

  3600s  = 1hr

Therefore;

   15 x m x $\frac{1}{s}$  x $\frac{1km}{1000m}$ x $\frac{3600s}{1hr}$    = 54km/hr