Question

Question #c997d

Answer 1

By the description of the question, one obtains that the signal can travel at most `25 km`.

Now that the Helicopter is `20km` east and `17km` south, one has to use a little geometry to find the distance of the helicopter from Zach.

Explanation:

By using the law of cosines, the distance between Zach and the helicopter is, (here the cosine term is 0 since east and south are perpendicular directions)

`d = (20^2 + 17^2)^(1/2)`

Thus, `d = 26.25 km`

Now you know can decide yourself if the signal reaches the helicopter!