I'm bored ask me questions
34 comments
TheRealFiberKing[OP]
11.11.2017 02:57
Linkcure me
If 2 trains leave their stations at the same time, one from Los Angeles and one from New York City, a distance of roughly 2797 miles, and the one from LA is traveling at 420 MPH, and the one from NYC is traveling at 9001 MPH, assuming there's one long track and their both on that same track, how long will it take until they crash in hours and minutes?
To solve this problem, you compute the distance traveled by train A (LA) and then the distance traveled by train B (NYC) and add the results together. The distance formula is
d = rt
d=distance
r=rate
t=time
Train A d (AD) + Train B d (BD) = 2797M
AD = 2797 - BD
2797 - BD / 420 = BD / 9001
Multiply each side by 420 and you'll get roughly
2797 - BD = BD * .047
add BD to each side and you'll get
2797 = 1.047 * BD
Divide each side by 1.047 and you'll get roughly
2671.44 = BD
So back to the original problem
AD + 2671.44 (BD) = 2797
2797 - 2671.44 = AD (125.56)
So it's
125.56 = 2671.44 = 2797
that means it would take roughly 18 minutes for them to crash
because AD / 420 = 17.94 and BD / 9001 + 17.8 or so, which should be the same but, i rounded up, it's still about 18 though
*note i have never done one of these problems in my life and am in 7th grade*
Also, the distance from LA and NYC is actually more like 2,451 miles so... you'd have to redo the problem w