Question 931879
john took 45 minutes to bicycleto his grandmothers house, a totalk of four kilometers . What is the velocity in km/hr?
<pre>
{{{

matrix(1,2,4,km)/matrix(1,2,45,min)}}}

Multiply by unit multiplier {{{

matrix(1,2,60,min)/matrix(1,2,1,hr)}}}

{{{matrix(1,2,4,km)/matrix(1,2,45,min)}}}{{{"×"}}}{{{

matrix(1,2,60,min)/matrix(1,2,1,hr)}}}

Cancel the minutes:

{{{matrix(1,2,4,km)/matrix(1,2,45,cross(min))}}}{{{"×"}}}{{{

matrix(1,2,60,cross(min))/matrix(1,2,1,hr)}}}

{{{matrix(1,2,"4×60"/"45×1",km/hr)}}}    

{{{matrix(1,2,240/45,km/hr)}}}

{{{matrix(1,2,16/3,km/hr)}}}

{{{matrix(1,2,5&1/3,km/hr)}}}   

Edwin</pre>