Question 1019106

Ling lives 2 miles from school. It took him 15 minutes to bike from school to home. The first half of the distance he biked at a speed of 12 mph. What was his speed for the remaining distance? What was his average speed?
<pre>Speed for 2nd leg: {{{highlight_green(matrix(1,2, 6, mph))}}}
Average speed: {{{2/(15/60)}}}, or {{{highlight_green(matrix(1,2, 8, mph))}}}