At true airspeed 50 m/s, air density 0.91 kg/m³ and pressure 70000 Pa, find equivalent airspeed in m/s (two decimal places). Standard sea-level density and pressure are 1.225 kg/m³ and 101000 Pa.
Equivalent airspeed matches the actual dynamic pressure at standard sea-level density: $\rho V^2=\rho_0V_E^2$. Thus $V_E=50\sqrt{0.91/1.225}=43.09$ m/s. Pressure is not separately needed once density is specified.
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