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How to solve... Practice Identifying an Error with Units. While looking through a mathematics textbook, you come across the following equation for the surface area

How to solve...

Practice Identifying an Error with Units. While looking through a mathematics textbook, you come across the following equation for the surface area of a cylinder:

A = 2 r h^{2} + 2 r^{2} .

You suspect this equation must have a mistake in it

.

How can you use units to tell what the mistake is

?

How could you use units to fix the mistake?

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