Homework Help: Math

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 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 ??
so

x/82 = (312-x)/74

cross-multiply and solve for x
put that back into x/82
Math - Reiny, Tuesday, February 10, 2009 at 6:38pm
just re-read 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???????

Answer this Question

Related Questions

math - at 1p.m. two trains, traveling towards each other, leave from towns that...
Math - At 1 pm two trains, traveling toward each other leave from towns that are...
math - two trains start from towns 208 miles apart and travel towards each other...
maths - Two trains are on the same track a distance 300 km apart heading ...
math - Supppose two trains leave Holbrook, Arizona, at the same time, traveling ...
math - Two trains depart at the same time from the same station and travel in ...
math - Two trains depart at the same time from the same station and travel in ...
Math - Train A and train B leave station going in opposite directions. Train B ...
trig - two trains leave Kansas City at the same time. Train A is traveling due ...
physicsHELP!!! - Two trains face each other on adjacent tracks. They are ...

For Further Reading

First Name:
School Subject:
Answer: