A trough has vertical ends that are equilateral triangles with sides of length $4 \mathrm { ft }$. If the trough is filled with water to a depth of $1 \mathrm { ft }$, find the force exerted by the water on one end of the trough. Round to one decimal place. (The weight density of water is $62.4 \mathrm { lb } / \mathrm { ft } ^ { 3 }$.) Select the correct answer.
A) $12.0 \mathrm { lb }$
B) $249.6 \mathrm { lb }$
C) $6.0 \mathrm { lb }$
D) $499.2 \mathrm { lb }$

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The Answer of A trough has vertical ends that are equilateral triangles with sides of length $4 \mathrm { ft }$. If the trough is filled with water to a depth of $1 \mathrm { ft }$, find the force exerted by the water on one end of the trough. Round to one decimal place. (The weight density of water is $62.4 \mathrm { lb } / \mathrm { ft } ^ { 3 }$.) Select the correct answer.
A) $12.0 \mathrm { lb }$
B) $249.6 \mathrm { lb }$
C) $6.0 \mathrm { lb }$
D) $499.2 \mathrm { lb }$

A Trough Has Vertical Ends That Are Equilateral Triangles with Sides