Answer
$1137 \; ft^3$.
Work Step by Step
Length of the cylindrical tank $h=25\;ft\;9\; in$.
Diameter of the cylindrical tank $d=7\;ft\;6\;in$.
Radius $r=\frac{d}{2}$
$r=\frac{7\;ft\;6\;in}{2} = 3\;ft\;9\;in$.
The formula for volume is:
$V=\pi r^2 h$
Plug all values into the formula.
$V=\pi (3\;ft\;9\;in)^2 (25\;ft\;9\; in)$
Simplify (rounded value).
$V=1137 \; ft^3$.