Converting compound units [Maths problem]

<p dir="ltr">Students often get confused when working with different compound units - such as converting miles per hour to meters per second, says Colin Foster,<b> </b><b>In this lesson, students think systematically about how </b><b>to convert compound units.</b><br><br><b><u>The difficulty</u></b></p><p dir="ltr">Which is faster 30mph or 30m/s ? (continued in article)</p>