Volume formula of the cylinder (tank is cylindrical, assumed from the given)
V = Area of base × height of prism
V = [tex] \pi [/tex]r²h
V = [tex] \pi [/tex](18.8)² × 24
V = 353.44[tex] \pi [/tex] × 24
V = 8482.56[tex] \pi [/tex] ft³ (in terms of [tex] \pi [/tex])
V = 26,648.74818 ft³
V ≈ 26,648.75 ft³