THE CORRECT ANSWER IS (E). SINCE X EQUALS THE RATE (SPEED) OF THE...
34. The correct answer is (E). Since x equals the rate (speed) of the freight train, you can
express the rate of the passenger train as x
1
45. Substitute these values for time and
rate into the formula for each train:
Formula: rate
3
time
5
distance
Passenger:
~x
1
45!~3! 5
3x
1
135
Freight:
~x!~3! 5
3x
The combined distance that the two trains covered is 3x
1
(3x
1
135)
5
6x
1
135.