[tex]radius :\ r=7 \ cm \\height : \ h=20 \ cm \\\\The \ volume \ of \ a \ cylinder \ is: \\ \\ V = \pi r^2 h \\\\V = \pi \cdot 7^2\cdot 20 =49\cdot 20\cdot \pi= 980 \pi \ cm^3 \\\\ \frac{1}{4}\cdot 980 \pi\ cm^3=245 \pi \ cm^3 \\\\Answer: \ A \ cylinder \ is \ 245 \pi \ cm ^ 3\ water .[/tex]
