<PRE><B>Question 92371</B>
At 9 am a truck leaves the truck yard and travels west at a rate of 50 mph. Two hours later, a second truck leaves along the same route, travelling at 75 mph. When will the second truck catch up to the first? 

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1st truck DATA:
Rate = 50 mph ; Time = x hrs. ; Distance = rt = 50x miles
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2nd Truck DATA:
Rate = 75 mph ; Time = x-2 hrs ; Distance = rt = 75(x-2) = 75x-150 miles
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EQUATION:
distance = distance
50x = 75x-150
25x = 150 
x = 6 hrs
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9 AM + 6 hrs = 3 PM
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Cheers,
Stan H.
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