SOLUTION: The question is: create a rectangle that has an area of 45 square centimetres and a peritimer of 36 centimetres. I have tried lots of numbers and it doesn't work.

Question 817225: The question is: create a rectangle that has an area of 45 square centimetres and a peritimer of 36 centimetres. I have tried lots of numbers and it doesn't work.
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

create a rectangle that has an area of 45 square cm and a perimeter of 36 cm.



  0r l = 45/w

   |Multiplying thru by w so as all denominators = 1

   90 + 2w^2 = 36w

   w^2 - 18w + 45 = 0 

  (w-15)(w-3) = 0

  (w-15) = 0 , w = 15cm ,  l = 3cm

0r(w-3) = 0 ,  w = 3cm  ,  l = 15cm

Dimensions of the Rectangle are 3cm  by 15cm

 A = 45cm^2  and Perimeter =  

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