Respuesta :
Answer:
The correct option is b. 15
Explanation:
We are given that a freight train travels at an average speed of 60 mph.
Also we are given that the average speed of passenger train is 72 mph.
We are also given that the freight train leaves 3 hours before passenger train. So the number of miles covered by freight train in 3 hours is:
[tex]3 \times 60 = 180[/tex] miles.
Let X be the number of hours it takes the passenger train to catch up the freight train.
Therefore, we have:
[tex]180 + 60 \times X = 72 \times X[/tex]
[tex]72X-60X = 180[/tex]
[tex]12X=180[/tex]
[tex]X=\frac{180}{12}[/tex]
[tex]X=15[/tex]
Therefore, the passenger train will take 15 hours to catch up the freight train.
Answer:
sorry im answering late but the answer is C. 18
Step-by-step explanation:
60 x 18 = 1,080
72 started 3 hours later so that means you subtract 3 from 18 which equals 15 and 72 x 15 = 1,080
ur answer is 18
