A cylinder has a height that is 2 times as large as its radius. The lateral area of the cylinder is 16 square units. What is the length of the radius of the cylinder?

Question

anonymous · Answer

it says lateral area..the lateral area of a cylinder is 2πrh

anonymous · Answer

you have that height is 2 times as large as its radius that means h=2r

anonymous · Answer

the only unknown in the equation now is r...solve for r and you will get the result

anonymous · Answer

Would it be 4?

anonymous · Answer

you got A=2πrh right?

anonymous · Answer

yup...

anonymous · Answer

A = 2πrh
2πr(2r) = 16π
4r^2 = 16
r = 4 units

anonymous · Answer

ahhh in units...yes

anonymous · Answer

thought you needed the result in meters

anonymous · Answer

Would that make a diffrence?

anonymous · Answer

to be honest i dont know about the measurements where you live we got meter here and well yeah it would say 16 square meters not square units ,i dont know what square unit is

anonymous · Answer

if it is square meter then you need to put 16 in equation not 16π

anonymous · Answer

Unit is the substitute thing you put in when it doesn't tell you what the measuring thing is.

anonymous · Answer

i think that you dont need a π there..i mean 16 would suffice

anonymous · Answer

Why would I not need pi?

anonymous · Answer

from what i checked it is some general unit of measurement

anonymous · Answer

No....

anonymous · Answer

from where you know that you need to put a π when it says square units?

anonymous · Answer

huh? ...no?

anonymous · Answer

well from what i checked in web no...even though i see it first time...it just means that your result will be in units(something more general)

anonymous · Answer

so it would be 16=4πr^2

anonymous · Answer

Pi cancels out on both sides. Leaving it 16=4^2 ...righ

anonymous · Answer

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