Question 1092092
Marcos traveled in his car from Phoenix to flagstaff on interstate 17, a mountain highway. He went a total of 155 miles in 2 hours 17 minutes without stopping. After driving for 2.2 hours, Marcos'  total distance travels was 153 miles. At what constant speed would he have to travel for the last 5 minutes in order to complete the 155 mile drive in 2 hours and 17 minutes?
<pre>He has 2 (155 - 153) miles to go, and 5 mins ({{{matrix(1,4, 5/60, or, 1/12, hr)}}}) to do it in, so his speed should be: {{{highlight_green(matrix(1,10, 2/(1/12), "=", 2, "÷", 1/12, "=", 2(12), or, 24, mph))}}}