C.IN THIS TYPE OF QUESTION, REMEMBER THE FORMULA DISTANCE = RATE×T...

65. c.In this type of question, remember the formula distance = rate×time. Let t= the time it takes thesecond car to catch up to the first. The fact that the second car is traveling 10 miles per hour fasterthan the first is not helpful by itself. We need to know more about either the distance traveled or thetime traveled. Statement (2) alone also does not give enough information because we do not know thedistances traveled. If we use both statements together, the first car’s distance is 50 (t+ 1) and the sec-ond car’s distance is 60t. When the second car catches up, their distances will be the same. Setting thetwo distances equal to each other gives the equation 50t+ 50 = 60t. We can subtract 50tfrom both

50

sides and divide by 10. .t= 5 hours.

10

^10t

10