Working out the initial velocity

1. The problem statement, all variables and given/known data
Tom decided to attempt to jump a 200m wide river on rocket skates. He built a 60m long ramp with an angle of 30° to the horizontal and plans to land on a mattress at ground level. Determine the launch speed necessary for Tom to be successful.

2. Relevant equations

I read up on this:
vo = √Rg/Sin(2 * θ)

3. The attempt at a solution

vo = √200 * g/Sin(2 * 30)
vo = √200*g/0.866

Not a homework question, but I stumbled upon this and want to learn this stuff.

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