Fluid dynamics (2)

1. The problem statement, all variables and given/known data

If the pressure reading of your Pitot tube is 17.0 mm Hg at a speed of 150 km/h, what will it be at 700 km/h at the same altitude?

2. Relevant equations

The only eq I could think if is p = p2+ 1/2 density (v2^2 – v1^2)

But I don’t know the density

3. The attempt at a solution

So I pretty much get stuck in the beginning, any help will be nice

Thanks

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