Calculating Muzzle Velocity of a Tank's Gun for a Uranium Projectile

[SamTsui86]

Homework Statement

A uranium projectile fired from a tank in Iraq has a volume of 351.00 cm3 and an intital kinetic energy of
2.00 × 103 kJ. What is the muzzle velocity of the tank's gun (m/s) ?

The density of uranium is 18.95 g/cm3

Homework Equations

Density = mass / volume

KE= 1/2 m v^2

The Attempt at a Solution

Using volume and density I figured out the mass
m = dv m = (18.95)(351) = 6651.45 g
plug in kinetic energy formula

KE = 1/2 m v^2 2000000 J = 1/2 6651.45 v^2

so v^2 is 601.37 and therefore v = 24.53 m/s

It kept saying that I am wrong, please help

 

[mukundpa]

Whether all quantities are taken same unit system?

what about gram and jule?