Question

A sphere and a cylinder have the same radius and height. The volume of the cylinder is 18 centimeters cubed.

Answer 1

Answer:

24

Step-by-step explanation:

Answer 2

Answer:

12 cm^3

Step-by-step explanation:

Before we do anything, we should set up the proportion.

$\frac{\pi * r^2*h}{\frac{4\pi r^3}{3}} = \frac{18}{x}$

Now do the Cancelations of \pi r^2 on the left.

h// (4/3) r  = 18/x

but h = 2*r

2r // (4/3) * r   = 18/x   Cancel the rs on the left

2// (4/3) = 18/x            Make 2 = 2/1 so you can handle the fraction

2/1 // (4/3) = 18/x         Invert and multiply the denominator

2/1 * 3/4 = 18/x

6/4 = 18x                     You can reduce the left side

3/2 = 18x                     Cross multiply

3x = 2*18                     Combine the right

3x = 36                        Divide by 3

x = 12

So what you have found is the volume of the sphere. 12 cm^3

This is a very interesting question. Keep in mind that physics does this all the time for any of the force formulas (but not all).

I'm a little long winded here, but the first time you see this, you should be given very small steps.