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A circular hole in a steel plate has a radius of (5.00 , cm) at (15^\circ C). At (115^\circ C), the hole area becomes (78.78 , cm^2). Find (\alpha_steel).
(315.8 , \textcm^2).
455.22 cm².
cap A sub f equals 2 m squared open bracket 1 plus open paren 2.4 cross 10 to the negative 5 power space raised to the composed with power C to the negative 1 power close paren open paren 80 raised to the composed with power C close paren close bracket dilatacion superficial ejercicios resueltos