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?

Question

anonymous · Answer

Dude you shouldn't have posted what you got...

anonymous · Answer

x = 18.75

dumbcow · Answer

no your work looked good
side length = 5

anonymous · Answer

That has to be wrong

anonymous · Answer

How can the side length of both be right...I object

anonymous · Answer

nope told you lol

anonymous · Answer

dumb cow, how about you show your work....

dumbcow · Answer

they are proportional
same base, diff heights yield diff volumes

anonymous · Answer

exactly as i told you before heromiles

anonymous · Answer

I don't agree

anonymous · Answer

dumbcow, show your work

dumbcow · Answer

V = 1/3*h*s^2
100 = (1/3)*12*s^2
100 = 4s^2
25 = s^2
5 = s

anonymous · Answer

and my work is here

anonymous · Answer

That's the same thing the other guy did, but I don't think so

anonymous · Answer

it is fine could someone help me with my question now please

anonymous · Answer

dude your wrong

dumbcow · Answer

google volume of a pyramid
v=1/3*AreaBase*height

anonymous · Answer

I already know what the volume of a pyramid is...the question you have to ask yourself is, did you do it right...

dumbcow · Answer

i think so, if not please show me

anonymous · Answer

dumbcow come help me plz

anonymous · Answer

he is too stubborn to admit he is wrong lol

anonymous · Answer

I didn't know I was wrong silver...I verified my answer with what I though was a legitmate source..

dumbcow · Answer

prove it to yourself, think about it
18.5 ^2 = 342 which is much bigger than volume of 100

anonymous · Answer

yep, I admit I was wrong, you happy Silver?

anonymous · Answer

no, im just glad you learned something today