A normal human being can rotate his neck at maximum angle of 70 degree at one stretch
So here the maximum angle is 70 degree upto which he can see the height
now we will have


now we have

so he is able to see the top at minimum distance of 81.2 m from that gate
Explanation:
Covalent or molecular compounds form when elements share electrons in a covalent bond to form molecules. Molecular compounds are electrically neutral. Ionic compounds are (usually) formed when a metal reacts with a nonmetal (or a polyatomic ion). Covalent compounds are formed when two nonmetals react with each other.
If an atom contains 13 protons, then it has <u>13 electrons.</u>