Qualification > Math

Another question - HELP!

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NotAbod:

--- Quote from: $~SauD~$ on May 15, 2011, 11:46:08 am ---Take your time,
If you have doubt search the formula over net ;)

--- End quote ---
thanks :P
okay :P

Ghost Of Highbury:
Volume of the pool = 1512m^3

1m^3 = 1000000cm^3
1512m^3 = 1512000000cm^3

The pipe transfers pi*12.5^2*14 = 6872cm^3/s

can be written as

6872cm^3 -> 1s
1512000000cm^3 (the whole pool to be transferred) -> ?

1512000000/6872 = 220023.3s

= 220023.3/60 = 3367minutes = 56.11 hours ~ 2.34 days

NotAbod:
220023.3/60 = 3367minutes ?
i get 3667m

SauD~:

--- Quote from: Ghost Of Highbury~ on May 15, 2011, 12:45:05 pm ---Volume of the pool = 1512m^3

1m^3 = 1000000cm^3
1512m^3 = 1512000000cm^3

The pipe transfers pi*12.5^2*14 = 6872cm^3/s

can be written as

6872cm^3 -> 1s
1512000000cm^3 (the whole pool to be transferred) -> ?

1512000000/6872 = 220023.3s

= 220023.3/60 = 3367minutes = 56.11 hours ~ 2.34 days


--- End quote ---
By the way, Can you just help me by telling why aren't we using the speed value here when the formula is
"Flow of water(volume of whole water) = Cross sectional (volume of the pipe) x Speed x time "
thanks

NotAbod:
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 :)

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