What is the perimeter of a rectangle with a length of 10 cm and a width of 4 cm?

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To find the perimeter of a rectangle, you can use the formula:

Perimeter = 2 × (Length + Width)

In this case, the length of the rectangle is 10 cm and the width is 4 cm. Plugging these values into the formula gives:

Perimeter = 2 × (10 cm + 4 cm)

Perimeter = 2 × 14 cm

Perimeter = 28 cm

Thus, the perimeter of the rectangle is 28 cm. This confirms that the correct choice is the one that states the perimeter is 28 cm.