# Thread: Math: If Train A leaves the station traveling...

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## Math: If Train A leaves the station traveling...

I

2. A: 42

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Took to long to edit...stay tuned.

4. Originally Posted by ptonsparky
Took to long to edit...stay tuned.
We can have the answer Googled before you get the question posted, I'll bet!!

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Originally Posted by K8MHZ
We can have the answer Googled before you get the question posted, I'll bet!!

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Raw Product Arrives at a set speed. Finished Product Leaves at a set speed. PA>PL

PL has a 3 minute head start on PA. What is the formula for raw product level to reach the start/stop point again?

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I do know that at my current speeds PA & PL, there is about a nine minute difference.

Yes, I know its Jr High or middle school math, but I'm in neither.

8. Originally Posted by ptonsparky
Raw Product Arrives at a set speed. Finished Product Leaves at a set speed. PA>PL

PL has a 3 minute head start on PA. What is the formula for raw product level to reach the start/stop point again?
I think there are too many details in the process that are left out to be able to answer.

How do you get a three minute head start on leaving when you haven't been processed yet?

Probably more a matter of asking the right question.

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You wili probably ask for the name of conductor's sister!
Phil Corso

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Originally Posted by kwired
I think there are too many details in the process that are left out to be able to answer.

How do you get a three minute head start on leaving when you haven't been processed yet?

Probably more a matter of asking the right question.
If the product is binned, at t=0 it will take 3 minutes to fill the bin up from its current level to "full". Since PA>PL, at some point the bin will fill up, but it will be longer than 3 minutes, based on the difference between PA and PL and the size of the bin, which has a total volume VT and a starting volume V0.

(VT - V0)/PA = 3

PA - PL = PN (net accumulation of product)

(VT - V0)/PN = X (time to fill the bin with material flowing in and out)

Since we aren't given VT or V0, rearrange the first equation to:

(VT - V0) = 3PA

or 3PA/(PA - PL) = X
Last edited by gadfly56; 05-09-18 at 12:06 PM.

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