Qualification > Math

Another question - HELP!

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SauD~:

--- Quote from: AboD on May 15, 2011, 01:05:56 pm ---ok here is the answer:
rate of flow per second = pi*12.5^2 * 14 = 6872 cm^3
time in seconds = (1512*100^3) / 6872 = 220023 seconds.
220023/ (3600*24) = 2.54 days.
0,54 * 24 = 13 hours
answer is 2days 13 hours.
same as ghost calcs :)

--- End quote ---
Just someone plz explain me why is everyone excluding the speed value -_____________-

NotAbod:

--- Quote from: $~SauD~$ on May 15, 2011, 01:08:13 pm ---Just someone plz explain me why is everyone excluding the speed value -_____________-



--- End quote ---
i used speed.
Rate of flow per second = pipe cross section area * speed

SauD~:

--- Quote from: AboD on May 15, 2011, 01:09:48 pm ---i used speed.
Rate of flow per second = pipe cross section area * speed

--- End quote ---
you used length not speed,
volume requires length!

NotAbod:

--- Quote from: $~SauD~$ on May 15, 2011, 01:30:20 pm ---you used length not speed,
volume requires length!

--- End quote ---
reread the question
cylinder hight is 14
speed is also 14.
i use the speed to find flow per second

hasan919:
Ahhh, thanks alot guys. i get it ;]

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