A bullet when fixed at a target with a velocity of `100 ms^(-1)`, penetrates one metre into it. If the bullet is fired with the same velocity as a similar target with a thickness `0.5` metre, then it will emerge from it with a velocity of
A. `50 sqrt(2) m//s`
B. `(50)/(sqrt(2)) m//s`
C. `50 m//s`
D. `10 m//s`