Answer:
60
Step-by-step explanation:
slow train = x
fast train = x + 20
First we get the amount of distance both trains have covered
500 - 300 = 200
Next we have to divide it by the number of hours it took
200 ÷ 2 = 100
Then we write our equation
x + x + 20 = 100
2x + 20 = 100
Subtract 20 from both sides
2x = 80
Divide 2 from both sides and your left with
x = 40
Next we write our expression for the faster train
x + 20
Since we found that x is 40, we plug it into the expression which is
now an equation and we get...
40 + 20 = 60
Answer = 60 mph