<PRE><B>Question 976287</B>
&lt;br&gt;
Let t be the number of hours after 9 am.&lt;br&gt;
The distance between the two people is changing at the rate of 60 miles each hour for 1 hour.&lt;br&gt;
The distance between them is changing at the rate of (60+50) = 110 miles each hour for (t-1) hours.&lt;br&gt;
The total distance between them after t hours is 335 miles.&lt;br&gt;
{{{60+110(t-1)=335}}}
{{{60+110t-110=335}}}
{{{110t=385}}}
{{{t=385/110=3.5}}}&lt;br&gt;
The time when the two people are 335 miles apart is 3.5 hours after 9 am, which is 12:30 pm.&lt;br&gt;
ANSWER: 12:30 pm&lt;br&gt;
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