1. A cylindrical candle has a radius of 4 cm and a height of 10 cm. Its volume is ___ cubic cm. Express your answer in terms of $\pi$.
2. If the radius of a cylinder is doubled while the height remains the same, how does the volume change?
3. A cylindrical water tower has a radius of 10 feet and a height of 20 feet. What is its volume in cubic feet? Leave your answer in terms of $\pi$.
4. In the formula $V = \pi r^2 h$, what does the term $\pi r^2$ represent?
5. A coffee mug is shaped like a cylinder with a radius of 4 cm and a height of 9 cm. Calculate its volume in terms of $\pi$. The volume is ___ cubic cm.
6. If a cylinder's height is doubled while its radius is kept the same, what is the effect on its volume?
7. A cylindrical barrel has a radius of 2 feet and a height of 5 feet. Its volume is ___ cubic feet. Express your answer in terms of $\pi$.
8. A cylindrical container has a radius of 4 inches and a height of 6 inches. Using $\pi \approx 3.14$, its volume is ___ cubic inches.
9. A water tank is a cylinder with a radius of 10 meters and a height of 7 meters. What is its approximate volume in cubic meters? Use $\pi \approx 3.14$.
10. A cylinder has a base with an area of 50 square cm and a height of 12 cm. What is the volume of the cylinder in cubic cm? ___