V = 33,600 m/s = velocity of projection.
for an object to escape the gravity of Earth , the speed should be 11.2 km/sec.
so the energy spent or work done in escaping the Earth's gravitational field will be:
1/2 * m * 11,200² Joules.
Energy remaining will be: 1/2 m * 33,600² - 1/2 * m * 11,200² Joules
= 1/2 * m * (1003520000) J
the the velocity will be = √1003520000 = 31, 678.4 m/sec