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

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

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

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.}}

The volume of a cylinder the area of the base times the length (v = pi * r² * l), so swapping this around a bit, the radius is 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 ;¬)}