find candle globe diameter

Question

An oil candle globe made of​ hand-blown glass has a diameter of 19.4 cm. What is the volume of the​ globe? Use 3.14 for .

Answer 1

Hi Donna, first let's write the equation for the volume of a sphere, which represents the globe in your question.

V = 4/3 π r³ where V = volume, π = 3.14 and r = radius

We were given the diameter which is 19.4 cm but our formula asks for radius. To find the radius, divide the diameter by 2. So.... 19.4 cm / 2 = 9.7 cm.

Now we can use our volume equation, plug in our numbers and solve:

V = 4/3 π r³

V = 4/3 x 3.14 x 9.7³

V = 4.188 x 9.7³

V = 4.188 x 912.673

V = 3822.27'

Hope this helps!

-Danielle