Question

Two spherical balloons are filled with water. The first balloon has a radius of 3 cm, and the second has a radius of 6 cm.

How much more water is in the larger balloon than in the smaller balloon?
Use 3.14 to approximate pi, and express your answer in the hundredths.

cm3

Answer 1

Ok so the volume of a sphere is V = (4
`\pi` r^3) / 3

So in the 3cm sphere the volume is V = 4
`\pi` 27 / 3 --> V = 36
`\pi`

and in the 6cm sphere: V = 4
`\pi` 216 / 3 --> V = 288
`\pi`

So it's 8 times bigger! (288 / 36 = 8)