At What Rate Is the Surface Area of a Cube $12 \mathrm { in } ^ { 2 } / \mathrm { min }$

question 117

Multiple Choice

At what rate is the surface area of a cube increasing if its edges are 2 inches and are increasing at a rate 3 inches per minute?

• A) \(12 \mathrm { in } ^ { 2 } / \mathrm { min }\)
• B) \(18 \mathrm { in } ^ { 2 } / \mathrm { min }\)
• C) \(2 \operatorname { in } ^ { 2 } / \min\)
• D) \(72 \mathrm { in } ^ { 2 } / \mathrm { min }\)
• E) \(4 \operatorname { in } ^ { 2 } / \min\)
• F) \(9 \mathrm { in } ^ { 2 } / \mathrm { min }\)
• G) \(36 \mathrm { in } ^ { 2 } / \mathrm { min }\)
• H) \(24 \operatorname { in } ^ { 2 } / \min\)

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