Question

An aircraft 2 km high from the ground. Calculate the plane's speed v. from A to B

Answer 1

S

$\begin{gathered} \frac{x}{sinx}=\frac{4}{100} \\ \\ x=3.11km \end{gathered}$

Speed v

$\begin{gathered} Speed\text{ =}\frac{x}{30} \\ \\ Speed\text{ V=}\frac{3.111}{30} \\ \\ Speed\text{ V=}0.1037\text{ }kmper\text{ sec} \\ \end{gathered}$

Covert to km per hour

By multiplying by 60

The final answer

$6.222km\text{ per hour}$