An automotive test consisted of driving a car the same distance three separate times, first at an average rate of 4 miles per hour, then 5 miles per hour, then 6 miles per hour. If the test took 74 hours to complete, how many miles was the car driven during the entire test?	Choose the correct choice.
A) 310	B) 320	C) 300	D) 360	E) 400
x is the segment to be traveled   x/4+x/5+x/6 =74   or 74x/120 =74   x = 120 miles . total distance =3*120= 
<gadget id="calculator">3*120</gadget>
<output>360</output>
360 miles   360
<result>D</result>
An automotive test consisted of driving a car the same distance three separate times, first at an average rate of 4 miles per hour, then 5 miles per hour, then 6 miles per hour. If the test took 74 hours to complete, how many miles was the car driven during the entire test?