A manganese sheet of dimensions 20 cm×30 cm at 25 ∘C is heated to 7 – InterviewSolution

1.	A manganese sheet of dimensions 20 cm×30 cm at 25 ∘C is heated to 75 ∘C, if the area of the sheet is increased by 0.72 cm2, what is the coefficient of superficial thermal expansion of manganese?
Answer» A manganese sheet of dimensions $20 cm \times 30 cm$ at $25^{\circ} C$ is heated to $75^{\circ} C$ , if the area of the sheet is increased by $0.72 {cm}^{2}$ , what is the coefficient of superficial thermal expansion of manganese?

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