Calculating speed, given distance and time
Try these examples:
Question
Alan travels \(100\,km\) in \(5\,hrs\). Find his average speed in \(km/h\).
\(Speed = \frac{{Distance}}{{Time}}\)
\(Speed = \frac{{100}}{5}\)
\(Speed = 20\,km/h\).
Alan's average speed is \(20\,km/h\).
Question
Find the speed of a train which travels \(243\,km\) in \(2\,hrs\; 15\,mins\).
\(Speed = \frac{{Distance}}{{Time}}\)
\(Time = 2\,hrs\; 15\,mins\)
\(15\,mins = 0.25\,hr\)
\(Speed = \frac{{243}}{{2.25}}\)
\(Speed = 108\,km/h\)
The train is travelling at \(108\,km/h\).