Question

ANSWERS GET MEDALS!!!!!!
The volume of a square pyramid varies jointly with its height and the square of its base side length. A square pyramid with a height of 9 meters and base side length 5 meters has a volume of 75 cubic meters. What is the base side length in meters of a square pyramid whose height is 12 meters and whose volume is 100 cubic meters?

Answer 1

Do you know what joint and inverse variation mean?

Answer 2

no

Answer 3

http://www.twiddla.com/563490

Answer 4

It strikes me that you should learn this, instead of simply asking questions that need it.
If l varies inversely with m, then:
l = k / m
for some constant k.
If l varies jointly with m, then:
l = k m,
for some k.
and if l varies jointly with n and m:
l = k m n
for some constant k.

Answer 5

dfyodor, visit twiddla real quick..

Answer 6

dfyodor is correct thats wat u shld use

Answer 7

give me a few minutes...I'll tell you

Answer 8

...........

Answer 9

this is how you solve it im pretty sure now

Answer 10

x = 18.75

Answer 11

silverstravin, we all have different ways of solving it

Answer 12

I actually made a reducing error earlier....75/100 = 3/4 not 1/25, that's why I wasn't getting the right result...

Answer 13

oh well i found that that way worked for me

Answer 14

you got the same answer as me?

Answer 15

no i got the right answer

Answer 16

and what answer was that, lol!

Answer 17

it was not 1.3333

Answer 18

I told you that one wasn't right....I changed it...x = 18.75

Answer 19

The side length is 18.75 m

Answer 20

no it is 5 meters

Answer 21

Let me verify that

Answer 22

Hey silverstravin....It's not 5 meters....That's the side length for the first pyramid, lol. They're asking for the side length of the second one

Answer 23

Silverstrain, the answer is definitely 18.75...you'll realize it's the answer....the easy way or the hard way....lol

Answer 24

no What is the base side length in meters of a square pyramid whose height is 12 meters and whose volume is 100 cubic meters? that is what there asking

Answer 25

and that is 5m

Answer 26

You should get someone to verify that for you. If you notice, the original square pyramid had a height of 9 meters, a base length of 5 meters and a volume of 75 meters cubed. The other pyramid that we have to find the base length of has a bigger height (12 meters) and a bigger volume (100 meters)....now how would it have the same base side length as the smaller one? lol

Answer 27

the volume went up yes, but so did the height so therefore the side length could be 5m

Answer 28

Nope, I solved it correctly. I'm sorry that you have no way of verifying it. I'd bet you all the money in your wallet. But I can show you if you give me one more chance....

Answer 29

I told you about the reducing mistake I made

Answer 30

well i did verify it and i am right trust me

Answer 31

You're not...

Answer 32

It's absolutely not right...I can assure you. Matter of fact...saifoo is here...ask him..