Question

V varies directly with the cube of r. V=36π and r =3
Please tell me how you do it

Answer 1

what is that you want?

Answer 2

the relation between V and r?

Answer 3

k first I think

Answer 4

So V = kr^3...

Answer 5

yes but my friend told me that I have to put pi on 3 to the 3rd

Answer 6

V = kr^3. you ok till here?

Answer 7

Well u have V = 36pi and r = 3.

Answer 8

yes

Answer 9

goin ahead of estudier substitute to get 36pi=k(27) as 3cube is 27

Answer 10

now divide by 27 on both the sides

Answer 11

ohh so that's it.. I thought you're going to arrange it to subtract 36 to 27

Answer 12

why are you subtracting? just divide to get 36pi/27=k...

Answer 13

reduce it to 4/3(pi)

Answer 14

yes I understood

Answer 15

good.. :)

Answer 16

Now I'm going to substitute everything thanks :D