Question

Zuri made 2 spheres using plaster. The smaller sphere has a radius of 6 cm. The larger sphere has a radius of 24 cm.

How much more plaster did Zuri use for the larger sphere?
Use 3.14 to approximate pi and express your answer in hundredths.

___cm3

Answer 1

I got 56972.16

Answer 2

Given the formula of sphere:
\[v=\frac{ 4*\pi*r ^{3} }{ 3 }\]
it is important to firstly find the ratio between the volume of the 2 spheres.

Answer 3

So I was wrong?

Answer 4

we could remove the 4, 3 and pi for both as they are the same.
Being left with the ratio 6^3=24^3
If we take the cubic root of both sides, they simply to
6=24
or 1=4.
Hence , the larger sphere is 4 times greater than the smaller one.
Required answer: It is needed 4 times the amount of plaster used to make the smaller sphere.

Answer 5

Got it @*louisa*

Answer 6

?

Answer 7

Not really

Answer 8

:/

Answer 9

@Hoslos

Answer 10

Ok.
I believe you understood the formula of volume of sphere.
The objective is to try and see how bigger the larger sphere is than the smaller one in terms of volume, yes?

Answer 11

Sorry my internet is slow

Answer 12

So was my answer right or wrong?

Answer 13

wrong.

Answer 14

Ok thats what i wanted to know so can u explain in a simpler way ?

Answer 15

Hello?...

Answer 16

calculate the volume of the 2 spheres and find their ratio in the form of 1:n
the answer will be n. Got it?

Answer 17

Nvm ur not much help