A car traveled from San Diego to San Francisco at an average speed of 45 miles per hour. If the journey back took twice as long, what was the average speed of the trip?
Options.
A) 30. B) 32. C) 36. D) 42. E) 44.
Let the time taken be = x   One way distance = 45x   Total distance traveled = 2 * 45= 
<gadget id="calculator">2 * 45</gadget>
<output>90</output>
90x   Total time taken= x + 2x = 3x   30.verage speed = 90x/3x = 30   30.nswer: 30.90 /3= 
<gadget id="calculator">90 /3</gadget>
<output>30</output>
30   30.nswer: 30.
<result>A</result>
A car traveled from San Diego to San Francisco at an average speed of 45 miles per hour. If the journey back took twice as long, what was the average speed of the trip?