A frustum is made by removing a small cone from a similar large cone work out the volume of the frustum, below give your answer in π
height of frustum=4cm
height of cone =16cm
height total 20cm
radius of frustum=15cm
radius of cone=?

Atoy company is considering a cube or sphere-shaped container for packaging a new product. the height of the cube would equal the diameter of the sphere . compare the volume to surface area ratios of the containers. which packaging will be more efficient? for a sphere, sa =4πr²

Complete the solution of the equation. find the value of y when x equals to 1 9x-5y=29

Identify the number as a rational or irrational.explain. 127