What is the perimeter of a rectangle with a length of 8 cm and a width of 3 cm?

To find the perimeter of a rectangle, the formula used is ( P = 2 \times (length + width) ). In this case, the length of the rectangle is 8 cm and the width is 3 cm.

First, calculate the sum of the length and the width:

[

length + width = 8 , cm + 3 , cm = 11 , cm

]

Next, multiply that sum by 2 to find the perimeter:

[

P = 2 \times 11 , cm = 22 , cm

]

The correct perimeter of the rectangle is therefore 22 cm, which would align with option B. The calculation confirms the standard formula for the perimeter of a rectangle, ensuring that both dimensions are accounted for properly.

In this scenario, 20 cm would be the result of miscalculating or misunderstanding the perimeter formula, while 26 cm and 28 cm are similarly incorrect due to arithmetic errors in applying the length and width in the formula.