<em><u>Answer:</u></em>Six hours and Twenty minutes.
<em><u>Step-by-step explanation: </u></em>The number before the : is the hours and the number after is the minutes, if you go even more in depth you will get to seconds and milliseconds.
Step-by-step explanation: The principle is that the slope of the line on a velocity-time graph reveals useful information about the acceleration of the object. If the acceleration is zero, then the slope is zero (i.e., a horizontal line). If the acceleration is positive, then the slope is positive (i.e., an upward sloping line).
