SOLUTION: Stephanie drove at an average rate of 50 miles per hour for 2 hours and then increased her average rate by 50% for the next 3 hours. Her average rate of speed for the 5 hours was <
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Question 54268: Stephanie drove at an average rate of 50 miles per hour for 2 hours and then increased her average rate by 50% for the next 3 hours. Her average rate of speed for the 5 hours was t miles per hour. What is the value of t? Answer by Nate(3500) (Show Source):
You can put this solution on YOUR website! average ~> 50mph
increase of 50% of average ~> 1.5(50) = 75mph
(50*2 + 75*3)/5 = t
(100 + 225)/5 = t
325/5 = t
65mph = t
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