what happens when you double the dimensions of a cylinder

Question

anonymous · Answer

please help

primeralph · Answer

The surface area and volume increase,

anonymous · Answer

^ he's right

anonymous · Answer

obviously but i know the volume is 4 times greater but what about the surface area

primeralph · Answer

Well, calculate it.

anonymous · Answer

wow i bet im better at you at math what grade are you in

primeralph · Answer

And the volume is more than 4 time greater.
yeah, you bet you're better than me at Math.

anonymous · Answer

nope becuase i calculated it

primeralph · Answer

Show me.

anonymous · Answer

attachment

anonymous · Answer

see

primeralph · Answer

V = pi *r*r*h
When dimensions are doubled, V = pi*2r*2r*2h = 8pi *r*r*h
So the new volume is 8 times the original.

anonymous · Answer

then what did I do wrong?????????????????

anonymous · Answer

OHHHHHHHHH

primeralph · Answer

You said V  = pi*r^2.  You left out the h.
Looks like you're really good at Math.

anonymous · Answer

yeah well i have a headache and i just had the flu

primeralph · Answer

Of course.
Good luck.

anonymous · Answer

Volume increases as the cube of the dimensional ratio increase; area will change as the square.  In the case where the length of everything doubles, that means volume increases by a factor of eight, area by a factor of four.