SOLUTION: A car travels a distance of 1742 miles at an average rate of 40 mph and returns at an average rate of 55 mph. Find the average rate for the round trip to the nearest tenth?

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Question 103439: A car travels a distance of 1742 miles at an average rate of 40 mph and returns at an average rate of 55 mph. Find the average rate for the round trip to the nearest tenth?
Answer by checkley75(3666) About Me  (Show Source):
You can put this solution on YOUR website!
1742/40+1742/55=2*1742/X
43.55+31.67=3484/X
75.22=3484/X CROSS MULTIPLY
75.22X=3484
X=3484/75.22
X=46.3 MPH IS THE AVERAGE SPEED FOR THE ENTIRE TRIP.