Question

question 11: mathematics knowledge what is the perimeter of the following rectangle? 9 m 3 m a: 20 m b: 18 m c: 24 m d: 12 m back next

Explanation:

Step1: Recall the perimeter formula for a rectangle

The formula for the perimeter \( P \) of a rectangle is \( P = 2\times (length + width) \).

Step2: Identify the length and width

From the diagram, the length \( l = 9\space m \) and the width \( w = 3\space m \).

Step3: Substitute the values into the formula

Substitute \( l = 9 \) and \( w = 3 \) into the formula: \( P = 2\times(9 + 3) \).
First, calculate the sum inside the parentheses: \( 9+3 = 12 \).
Then, multiply by 2: \( 2\times12 = 24 \).

Answer:

C: 24 m