1.

Two holes of unequal diameters \[{{d}_{1}}\] and \[{{d}_{2}}\]\[({{d}_{1}}>{{d}_{2}})\]are cut in a metal sheet. If the sheet is heated,

A.              both \[{{d}_{1}}\] and \[{{d}_{2}}\] will decrease
B.  both \[{{d}_{1}}\] and \[{{d}_{2}}\] will increase  
C.  \[{{d}_{1}}\] will increase, \[{{d}_{2}}\] will decrease
D.  \[{{d}_{1}}\]will decrease, \[{{d}_{2}}\] will increase
Answer» C.  \[{{d}_{1}}\] will increase, \[{{d}_{2}}\] will decrease


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