A ball, which weights $3$ kg $,$ is attached to an inextensible rope. Length of a rope is $3$ m and it swings in a vertical plane. If $a=45$ and rope tension is $200$ N $,$ the speed of the ball is:

$9\mathrm{.}9\frac{m}{s}$

$17\mathrm{.}4\frac{(m)}{(s)}$

$14\mathrm{.}9\frac{(m)}{(s)}$

$12\mathrm{.}9\frac{(m)}{(s)}$