Posted by will on Tuesday, February 10, 2009 at 6:31pm.
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

Math  Reiny, Tuesday, February 10, 2009 at 6:37pm
let the distance travelled by the faster train be x km
let the distance traveled by the slower train be 312x km
time for faster train = x/82 hours
time for slower train = (312x)/74 hours
when they meet, wouldn't they have traveled for the time ??
so
x/82 = (312x)/74
crossmultiply and solve for x
put that back into x/82

Math  Reiny, Tuesday, February 10, 2009 at 6:38pm
just reread your post and noticed you are dealing with inequalities.
Make the appropriate changes, the math doesn't change.

Math  KeikoABird, Saturday, January 26, 2013 at 6:36pm
Reiny, do you know how unhelpful that is???????
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