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The width of the rectangle below is 6 cm, and its perimeter is 42 cm. What is its area? Its area is cm² Enter the answer Check it Improve this question

User Aysha
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1 Answer

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ANSWER

A = 90 cm²

Step-by-step explanation

This is the rectangle

The perimeter of a rectangle is:


P=2W+2L

We know the perimeter is 42cm and the width is 6cm, we can find the length:


\begin{gathered} 42=2\cdot6+2L \\ 42=12+2L \\ 42-12=2L \\ L=(42-12)/(2) \\ L=(30)/(2) \\ L=15\operatorname{cm} \end{gathered}

The area of a rectangle is:


A=W* L

Now that we've found the length we can find the area:


A=6\operatorname{cm}*15\operatorname{cm}=90\operatorname{cm}^2

The width of the rectangle below is 6 cm, and its perimeter is 42 cm. What is its-example-1
User EpiMan
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