Rectangle Dimensions from Perimeter

The perimeter of the rectangle is 56 cm, and its length is three times greater than its width. What are the dimensions of the rectangle?

Final Answer:

a =  21 cm
b =  7 cm

Step-by-step explanation:

o=56 cm  o= 2a+2b a=3b  o=2 3 b+2b 56=2 3 b+2b  56=2 3 b+2 b  8b=56  b=856=7  b=7  a=3 b=3 7=21 cm



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