A car going at 40 miles per hour set out on an 90-mile trip at 9:00 A.M. Exactly 10 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?
Pick
A) 45 B) 50 C) 53 D) 55 E) 90
Let Car A = car that starts at 9 AM   Car B = car that starts at 9:10 AM   Time for which car A travels at speed of 40 m per hour = 1.5 hours   Distance travelled by Car A = 40 *1.5= 
<gadget id="calculator">40 *1.5</gadget>
<output>60</output>
60 miles   Since Car B catches up Car A at 10:30 , time= 90 mins = 3/2 hour   Speed of Car B = 60/(3/2) = 90 miles per hour   Answer 90
<result>E</result>
A car going at 40 miles per hour set out on an 90-mile trip at 9:00 A.M. Exactly 10 minutes later, a second car left from the same place and followed the same route. How fast, in miles per hour, was the second car going if it caught up with the first car at 10:30 A.M.?