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A sphere has a volume of 86.5cm3 find the radius

 Jan 2, 2015

Best Answer 

 #1
avatar+808 
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The volume of a sphere is given by this formula:

 

$$V =\frac{4}{3}pi*r^3$$

 

You wish to find the radius, r. 

 

1. Divide both sides by 4pi/3:

 

$$\frac{3V}{4pi} = r^3$$

 

Take the cube root on both sides:

 

$$r = 3root[\frac{3V}{4pi}]$$

 Jan 3, 2015
 #1
avatar+808 
+5
Best Answer

The volume of a sphere is given by this formula:

 

$$V =\frac{4}{3}pi*r^3$$

 

You wish to find the radius, r. 

 

1. Divide both sides by 4pi/3:

 

$$\frac{3V}{4pi} = r^3$$

 

Take the cube root on both sides:

 

$$r = 3root[\frac{3V}{4pi}]$$

Tetration Jan 3, 2015

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