...7.92 inches inside diameter ...
Ugh! Who made _that_ one up? Let's stick to one system of units.
1 inch = 2.54 cm [type "inch" into Google to get this if you don't know it]
so 7.92 in. is how many cm?________________
Volume of a cylinder = length x area
so we need to know area.
Area = π r2
(you knew, right) so we need to know radius
radius = diameter/2
= how many centimeters? __________
Now find the area ________________
and multiply by length
...and 22 km. long...
There are 100 cm in a meter and 1000 m in a km
so length in cm is ____________________
Multiply and get volume in cubic cm.___________
Now convert back [go to Google to find how many liters in a cubic foot; a liter is a thousand cubic centimeters.] And your answer
....in cubic feet of water _____________________
After you have completed the steps outlined above not before you can check your answer using our volume calculator.
Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences.