We have that The area that the light covers is is mathematically given as
[tex]A=\pi x^2[/tex]
From the Question we are told that
Revolving beam of light as far as the pier
Let distance to pier be x
Generally the revolving beam turns a complete angle of 360
Therefore
Its goes in a circle
The area that the light covers is is mathematically given as
[tex]A=\pi r^2[/tex]
[tex]A=\pi x^2[/tex]
In conclusion
The area that the light covers is is mathematically given as
[tex]A=\pi x^2[/tex]
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