Question 1165952
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<pre>

First find the vertical component of the initial velocity vector


     {{{V[vert]}}} = 8*sin(35°)  m/s.


Then find the time for the ball to reach its maximum height


    {{{t[max_height]}}} = {{{V[vert]/g}}} = {{{8/9.81}}}  seconds.



Then double this time.
</pre>


That's all.