SOLUTION: A small plane flies 810 miles from Los Angeles to Portland, Or. with an average speed of 270 mph. An hour and half after the planes leaves, a Boeing 747 leaves Los Angeles for Port

Question 921570: A small plane flies 810 miles from Los Angeles to Portland, Or. with an average speed of 270 mph. An hour and half after the planes leaves, a Boeing 747 leaves Los Angeles for Portland. Both planes arrives in Portland at the same time. What was the average speed of the 747?

Found 2 solutions by josgarithmetic, MathTherapy:
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
____________________rate___________time____________distance
SMALL_______________270_________________________810
BG747________________r______________________________810

Most important is to understand the data shown in the table.
Use the basic travel uniform rate rule RT=D; and use the SMALLL data to find t, and use this result to find r in the Boing747 data.
Answer by MathTherapy(10552) (Show Source): You can put this solution on YOUR website!

A small plane flies 810 miles from Los Angeles to Portland, Or. with an average speed of 270 mph. An hour and half after the planes leaves, a Boeing 747 leaves Los Angeles for Portland. Both planes arrives in Portland at the same time. What was the average speed of the 747?

Time small airplane traveled for: , or 3 hours
Boeing 747 takes 1.5 hours less, or 3 � 1.5, or 1.5 hours
Speed of 747: , or mph
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