A rocket of 30000kg mass acquires a speed of 2000k after takeoff. The power expended during this time is in 1minute?

Answer 1

the acceleration of the rocket is (2000km/s)/(60s) = 1/3 * 10^5 m/s^2
The distance traveled by the rocket is 1/2 * 1/3 * 10^5 * (60s)^2 = 6 * 10^7 m
The work done lifting the rocket to that height is 3000*9.8 * 6*10^7 = 1.764*10^12 J
The power was thus 1.764*10^12/60 = 2.94*10^10 W

Answer 2

oops. was 2000k supposed to be km/hr?
I made it 2000km/s !!
Probably not what was wanted...
I'm sure you can make the adjustment.