200 Followers Problem!

A rocket is fired vertically upwards and Moves with a net acceleration of $$20{ms}^{-2}$$ After one minute, The fuel is exhausted. The time taken by the rocket to reach the highest point after the fuel is exhausted is nearly $$x\ minutes$$.

Calculate $$200*x$$

Details and Assupmtions

Assume Gravity to be $$10{ms}^{-2}$$

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