Question

what is the perimeter and lenght of a rectangle if area=515.97 and width=18.9 ....???

Answer 1

2widths and 2lenghts give perimeter. and length times width is area you have to unkowns in two equations solve for one then substitute

Answer 2

\[2l+2w=perimeter\]

Answer 3

\[lw=area(515.97)\]

Answer 4

substitute 18.9 for w and solve for l in the second equation

Answer 5

how do i get the lenght??

Answer 6

what do you get

Answer 7

in the second equation lenght times width equalls area subtitute 18.9 then solve for l by dividing both sides of the equation by w

Answer 8

is it right?? i get 27.3 for the leght... can you please check it if it is right... :d

Answer 9

yes

Answer 10

now substitute l and w in the first equation to get the perimeter.

Answer 11

so what is the p??

Answer 12

thanks!

Answer 13

2l+2w=perimeter