February 27, 2017

Homework Help: MATH-Stuck

Posted by Anonymous on Thursday, September 23, 2010 at 10:28pm.

For each of the following, the Surface Area is given. Calculate the missing dimension.

This is a rectangular prism with the width missing. The height seems to be 20 cm. The length I guess is 34 cm, and the Surface Area is 6020cm square. How do I find the missing width? I checked in the back of the book for the answer and it said 43.1. I have no clue how they came up with that.

Also the formula my teacher gave me to find the surface area of this dimension is....

SA = 2lw + 2lh+ 2wh.

I just don't get how to find the missing dimension. Please Help.

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