Question 328105
<font face="Garamond" size="+2">


Use Pythagoras:


*[tex \LARGE \ \ \ \ \ \ \ \ \ \ \sqrt{50^2\ -\ 30^2}]


or


Recognize a 3-4-5 right triangle, hence 40 meters.



John
*[tex \LARGE e^{i\pi} + 1 = 0]
</font>