SOLUTION: the length of a rectangle is 40 cm longer than its breadth.if the area of the rectangle is 1200 cm2, calculate the length of the rectangle.

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Question 1073768: the length of a rectangle is 40 cm longer than its breadth.if the area of the rectangle is 1200 cm2, calculate the length of the rectangle.
Found 2 solutions by ikleyn, jorel1380:
Answer by ikleyn(52915) About Me  (Show Source):
Answer by jorel1380(3719) About Me  (Show Source):
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Let n be the width of the rectangle. Then its length is n+40. So:
n(n+40)=1200
nē+40n-1200=0
(n+60)(n-20)=0
n=-60 or 20
The width of the rectangle is 20 cm.; its length is 60 cm. ☺☺☺☺