# measurements

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### measurements

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
guest

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
Dirtman
Expert

Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

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 ft┬│. Following (2) with corrected volume, I get 34872 L.
Guest

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 ft┬│. 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
Expert

Posts: 574
Joined: Sat Jan 21, 2006 2:04 pm
Location: California

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