measurements

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measurements

Postby guest » Tue Oct 21, 2008 11:48 pm

Hope you can help. I have a railway tank and I would like to know it's litre cap. The tank is 7ft across and 32ft long
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Postby Dirtman » Wed Oct 22, 2008 8:53 am

The formula for the volume of a cylindical tank is: PI * radius squared * length.

It's easier to work with the same system of measures but as you used feet as a length measure to obtain a metric measure:

1) Determine ft^3 (cubic feet)
3.5^2 * 3.1415927 * 32 = 392 ft^3

2) Convert ft^3 to liters
1 ft^3 = 28.3168 liters so: 392 ft^3 * 28.3168 = 11,100.19 liters
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Postby Guest » Wed Oct 22, 2008 6:22 pm

Dirtman wrote:The formula for the volume of a cylindical tank is: PI * radius squared * length.

It's easier to work with the same system of measures but as you used feet as a length measure to obtain a metric measure:

1) Determine ft^3 (cubic feet)
3.5^2 * 3.1415927 * 32 = 392 ft^3

2) Convert ft^3 to liters
1 ft^3 = 28.3168 liters so: 392 ft^3 * 28.3168 = 11,100.19 liters


In (1), the volume equation is set up correctly, but I think an entry error was mde. I get 1231.5 ft³. Following (2) with corrected volume, I get 34872 L.
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Postby Dirtman » Thu Oct 23, 2008 11:37 am

Anonymous wrote:
Dirtman wrote:The formula for the volume of a cylindical tank is: PI * radius squared * length.

It's easier to work with the same system of measures but as you used feet as a length measure to obtain a metric measure:

1) Determine ft^3 (cubic feet)
3.5^2 * 3.1415927 * 32 = 392 ft^3

2) Convert ft^3 to liters
1 ft^3 = 28.3168 liters so: 392 ft^3 * 28.3168 = 11,100.19 liters


In (1), the volume equation is set up correctly, but I think an entry error was mde. I get 1231.5 ft³. Following (2) with corrected volume, I get 34872 L.


I re-calculated it and concur with your figure of 34872 liters.

Thought I forgot to square the radius but that only comes to 351.85 ft^3. Don't know what I did but thanks for the correction.
Dirtman
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Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California


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