Rectangle area calculation

The rectangle has a circumference of 30 cm, and its width is 3 cm shorter than its length. What is its area?

Final Answer:

a =  6 cm
b =  9 cm
S =  54 cm2

Step-by-step explanation:

a=b3 2(a+b)=30  2((b3)+b)=30  2 ((b3)+b)=30  4b=36  b=436=9  b=9  a=b3=93=6 cm
S=a b=6 9=54 cm2



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