the volume of a cylinder is 402.12 ft3 and the height is twice the radius what is the radius of the cylinder?

Answer 1

The equation for the volume of a cylinder is:

V = π * r² _{* h}

_{Where V is volume}

_{Pi = 3.14159 (ratio of circumference of a circle to the diameter)}

_{H = is the height of the cylinder}

_{r = the radius of the base}

_{For this problem}

_{V = 402.12}

_{Pi = 3.14159}

_{r = r and}

_{h = 2r}

_{We know have an equation with only one variable (r) so you can just solve by algebra:}

_{402.12 = pi * r* 2r}

_{Do you think you could take it from there? Comment if you need more help.}