A Trough Has Vertical Ends That Are Equilateral Triangles with Sides

question 17

Multiple Choice

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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