posted by will on .
Please help me answer this!
At 1pm, two trains traveling towards each other leave from towns 312km apart. One train can travel at most 82 km/h, and the other train at most 74 km/h. What is the earliest possible time for the two trains to meet?
For this problem:
a. define variables
b. write an inequality that can be used to solve the problem
c. solve the inequality
let the distance travelled by the faster train be x km
let the distance traveled by the slower train be 312-x km
time for faster train = x/82 hours
time for slower train = (312-x)/74 hours
when they meet, wouldn't they have traveled for the time ??
x/82 = (312-x)/74
cross-multiply and solve for x
put that back into x/82
just re-read your post and noticed you are dealing with inequalities.
Make the appropriate changes, the math doesn't change.
Reiny, do you know how unhelpful that is???????