Mathematics
Dmoney2001
2015-11-18 14:54:57
The length of a rectangle is 3 times its width. The rectangle’s width is 4 m. What is the area of the rectangle? Enter your answer in the box. m²
ANSWERS
riri3
2015-11-18 15:27:05

A= 12m² will be your answer. hope this helps, Taylor

mia0620
2015-11-18 15:28:20

Call the length [latex]l[/latex] and the width [latex]w[/latex]  We are told: 1. "The length of a rectangle is 3 times its width." i.e.: [latex]l=3w[/latex] 2. "The rectangle’s width is 4 m." i.e.: [latex]w=4[/latex] So, by substitution we have: [latex]l=3w[/latex] [latex]l=3(4)[/latex] [latex]l=12m[/latex] Then we can use our area formula: [latex]A=lw[/latex] [latex]A=(12m)(4m)[/latex] [latex]Area=48m^{2}[/latex]

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