207Views8Replies

# If i have a 72 cubic inch CYLINDER that is 11 inches long, what is diamater of this cylinder?

If i have a 72 cubic inch CYLINDER that is 11 inches long, what is diamater of this cylinder?

207Views8Replies

If i have a 72 cubic inch CYLINDER that is 11 inches long, what is diamater of this cylinder?

## Comments

11 years ago

Volume = Pi * radius

^{2 * height}radius

^{2 = volume \ height = 72\11 = 6.54}radius = 6.54

^{0.5 = 2.558 inches}diameter = 2 * radius = 5.116 inches

Answer 11 years ago

Stupid formatting. You get the picture :)

Answer 11 years ago

The Formula is wrong! Pie are round, Cake are square! LOL

11 years ago

Too bad "CHEAT" isn't one of the flag options.

11 years ago

If you have measured the length, then you should be able to use the same ruler to measure the diameter.

_{Asking other people to do your homework is called cheating.}Answer 11 years ago

I hate word problems that make you look like a moron... "A building is 300ft tall and casts a shadow on your friend, you measure that your friend is 200ft away from the building and casts a shadow that is 40ft long. How tall is your friend."

11 years ago

The volume of a cylinder the area of the base times the length (v = pi * r

^{2}* l), so swapping this around a bit, theradiusis sqrt( V / (pi * h)).Putting in your values : r =sqrt(72 / (pi * 11)) = 1.443 inches.

So the diameter is twice that . . .

2.886 inches.^{(No doubt some smarty pants will answer this with all the correct symbols shown ;¬)}Answer 11 years ago

Oooops. Thanks, I left PI out my calcs :D