Uhhh ......... Kinda depends on your exact definition of "90mm" there. Is it a 1) shell (aka: a round of ammo)? 2) complete/partial field gun (howitzer)? The question needs some clarification ......
90mm / 2 = 45 mm
83
10mm = 1cm so 90mm = 9cm
90mm
The value of a 90mm cannon shell varies by its condition. As of 2014 these shells sell at auction for around 50.00.
90mm = 9cm
90mm
469cm
90mm is 9cm
90 millimeters is 3.54 inches.
times it by ten.. 90mm