Two friends were driving a Ferrari at 55mph and they traveled x miles with that speed. The next x+20 miles were traveled by them at a speed of 40mph. If they drove for hundred minutes in total.
What is the distance that they traveled in total ? Choose the correct choice from the following answers.
A) 64 2/57 miles B) 74 2/57 miles C) 84 2/57 miles D) 94 2/57 miles E) 54 2/57 miles
Solution:   t1 + t2 = 100 minutes = 100/60 hours   t1 = x/55   t2 = (x+20)/40   x/55 + (x+20)/40 = 100/60   x = 1540/57   Total distance = x + (x+20) = 4220/57 miles = 74 2/57 miles   Answer 74 2/57 miles
<result>B</result>
Two friends were driving a Ferrari at 55mph and they traveled x miles with that speed. The next x+20 miles were traveled by them at a speed of 40mph. If they drove for hundred minutes in total.
What is the distance that they traveled in total ?