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Real-Life Math

A boat rammed its bow into a rock reef. Although the vessel didn't sink, the reef caused extensive damage to the front of the boat. Because it is much cheaper to repair it rather than purchase a new boat, you have been called to weld it together.

"You've got to know the square footage of materials and how to read a tape measure," says underwater welder Mark Capadouca. Being a welder underwater requires additional math skills. "You need to be able to read depth charts and to calculate how much time you will be able to spend underwater."

You are welding several pieces that have been designed and cut by a metal worker. As you work, you need to know the perimeter of a rectangular section that the metal worker is about to create.

The metal worker doesn't know the perimeter.

"The area is going to be 15 inches squared, and the length of 1 side will be 5 inches," he says.

What is the perimeter of this piece?

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