What is Prism, cylinder?

Example 53.9

A tent is a prism lying on its side: its bases are triangles of base $2$ m and height $1.5$ m, and the tent is $3$ m long.

1. Base area: $B = \frac{2 \times 1.5}{2} = 1.5$ m$^2$.
2. Volume: $V = B \times h = 1.5 \times 3 = 4.5$ m$^3$.

A tin can of radius $4$ cm and height $11$ cm: $V = \pi \times 4^2 \times 11 = 176\pi \approx 553$ cm$^3$, roughly half a liter.