A rubber cord catapult has cross-sectional area `25 mm^(2)` and initial length of rubber cord is `10 cm`. It is stretched to `5 cm`. And then released to protect a missle of mass `5 gm` Taking `Y_("nibber")=5xx10^(7)N//m^(2)` velocity of projected missle is
A. `20 ms^(-1)`
B. `100 ms^(-1)`
C. `250ms^(-1)`
D. `200 ms^(-1)`
