Question A$2$: Aircraft commonly use pitot$-$static tubes to determine their airspeed. If an

aircraft is flying at $11\mathrm{.}000$ m $($pressure of still air is $30$ kPa $,$ temperature is $-55C)$ and the

pitot$-$static tube readings yield a stagnation pressure of $51$ kPa $,$ determine the airspeed of

the aircraft. What would be the error in the speed estimated if the Bernoulli equation

were blindly used? For air, use $R=287\frac{J}{k}g-K,=1\mathrm{.}4.$