Question

The perimeter of a rectangle is 90 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 8: 7.

30 ft by 15 ft
26 ft by 19 ft
24 ft by 21 ft
20 ft by 25 ft

Answer 1

Perimeter = 2(l+w)
l /w = 8/7 => l = 8/7w
90 = 2(w+8/7w)
Solve for w then for l

Answer 2

???

Answer 3

ok so I solved for W and I got 14.5 it is closest to A so that would be my answer

Answer 4

And W means width right?

Answer 5

right

Answer 6

Ok

Answer 7

did I help at all?

Answer 8

How did u find the width

Answer 9

The perimeter divided by what?

Answer 10

90 = 2(w +8/7w)
45 = 15/7w
45*7 /15 = w
21 = w
l = 8/7 w
l = 24

Answer 11

How did you get 15/7w

Answer 12

w + 8/7w = (7w +8w)/7

Answer 13

SO basically 7+8 divided by 7??

Answer 14

yes

Answer 15

2.1428... is what i got ??

Answer 16

w is still unidentified here. you have
45 = (8+7)/7 * w

Answer 17

WOAH...where did u get 45?!?!

Answer 18

Im SOO sorry...i gotta go, Bye :(

Answer 19

Perimeter of a rectangle is
P = 2(l+w)
l/w = 8/7 (given in question)
so l = 8/7 w
Perimeter = 90 (given )
90 = 2(w +8/7w)
90/2 = (7+8)/7 * w
45 = 15/7 *w