Question

24. A train traveled from city A lo city B in 4.5 hours at a speed of 72 mph. The return trip was madein 4 hours. Find the speed for the return trip.

Answer 1

We first fin the distance between city A and city B, that is:

$d=\frac{72\cdot4.5}{1}\Rightarrow d=324$

We now know that city A and city B are apart by 324 milles.

Now, knowing this, we calculate ther return speed, as follows: