Question

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

Answer 1

S

`\begin{gathered} (x)/(sinx)=(4)/(100) \\ \\ x=3.11km \end{gathered}`

Speed v

`\begin{gathered} Speed\text{ =}(x)/(30) \\ \\ Speed\text{ V=}(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}`