A Square Hole,30 Cm on Each Edge,is Cut in the Center

question 21

Multiple Choice

A square hole,30 cm on each edge,is cut in the center of a square aluminum plate 1 m on a side.The coefficient of linear expansion of aluminum is 2.4 $\times$ 10^-5/Cº.If the plate is heated 25 ºC above the starting temperature,the area of the hole

• A)increases by 1.1 cm².
• B)increases by 0.54 cm².
• C)increases by 0.00060 cm².
• D)decreases by 0.54 cm².
• E)decreases by 0.00060 cm².

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