Concept explainers
The expression that represent the round-trip air time.
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Answer to Problem 43PPE
Explanation of Solution
Given information:
The groundspeed for jet traffic from Los Angeles to New York City can be about 100 mi/h faster than the groundspeed from New York City to Los Angeles. Let r is a jet’s groundspeed from New York City to Los Angeles. The distance between two cities is about 2500 miles.
Concept used:
The formula for the distance traveled is
Calculation:
Let r is a jet’s groundspeed from New York City to Los Angeles. So, the speed from Los Angeles to New York City would be
Now in order to find the expression that represents the total time, use the time-distance formula with the given values as shown below
Thus, the expression for total time is
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