Asked by Randy
a rectangle has a perimeter of 22cm and an area of 30 cubic meter. what are its dimensions?
Answers
Answered by
Reiny
area is measured in square metres, not cubic metres.
If that is what you meant ....
length ---x
width ---y
2x + 2y = 22
x+y = 11 ---> y = 11-x
xy = 30
x(11-x) = 30
11x - x^2 - 30 = 0
x^2 - 11x + 30 = 0
solve for x, it factors very nicely.
If that is what you meant ....
length ---x
width ---y
2x + 2y = 22
x+y = 11 ---> y = 11-x
xy = 30
x(11-x) = 30
11x - x^2 - 30 = 0
x^2 - 11x + 30 = 0
solve for x, it factors very nicely.
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