![A rectangular piece of iron measuring 4 cm by 3 cm at 20°C is heated until its temperature increases by 100°C. Calculate the new area of the metal. [Linear expansivity of iron is 1.2 x 10^−5 K¯¹]](https://erudites.ng/wp-content/plugins/accelerated-mobile-pages/images/SD-default-image.png)
![A rectangular piece of iron measuring 4 cm by 3 cm at 20°C is heated until its temperature increases by 100°C. Calculate the new area of the metal. [Linear expansivity of iron is 1.2 x 10^−5 K¯¹]](https://erudites.ng/wp-content/uploads/2020/06/past-questions-and-answers.jpg)
A rectangular piece of iron measuring 4 cm by 3 cm at 20°C is heated until its temperature increases by 100°C. Calculate the new area of the metal. [Linear expansivity of iron is 1.2 x 10^−5 K¯¹]
A. 12.0144 cm3
B. 12.0346 cm3
C. 12.0288 cm3
D. 12.0173 cm3
Correct Answer:
Option C = 12.0288 cm3
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