Wednesday

March 4, 2015

March 4, 2015

Posted by **ken** on Monday, November 1, 2010 at 6:52pm.

i think [4(pi)r(cubed)]/3=volume of hemisphere

and h (pi) r squared volume of the cylinder.

so

[4(pi) r (cubed)/3] + [45 (pi) r squared= volume of bin

so

[4 r (cubed)/3] + [45 (pi) r squared=volume

how do i solve for r?

sorry, i'm stuck

- algebra -
**bobpursley**, Monday, November 1, 2010 at 6:56pmthe volume of a sphere is 4/3 PI r^3, so a hemisphere would be half of that.

If you have an equation such as this,

a r^3 + b r^2 + c=0

it is a third degree equation. I think I would graph

f(r)= a r^3+b r^2+c and see where it crosses the axis, that is a solution.

There are ways to solve cubic equations, but for this, I would graph it.

- algebra -
**ken**, Monday, November 1, 2010 at 7:09pmthanks Mr. Pursley,

graphing it now.

**Answer this Question**

**Related Questions**

math - The volume of each shape is 250 cubic inches. A) Find the height of a ...

math - Juanita is packing a box that is shaped like a rectangular prism.The box ...

mat 116/algebra - A cylinder has a radius of 5 in. If the volume of the cylinder...

math - The bottom portion of a loading bin is cone shaped. The base radius of ...

Calculus - Find the radius, volume, and hieght of the right- circlar cylindar ...

calc - A machine lengthens a metal cylinder by rolling it under pressure. The ...

Algebra - The formula for the volume of a cylinder is: V=πr^2*h If the ...

math - what is the volume in cubic inches of a cylinder that has a height of 10 ...

math - what is the volume in cubic inches of a cylinder that has a height of 10 ...

math - what is the volume in cubic inches of a cylinder that has a height of 10 ...