Question

A rectangular football pitch has its length equal to twice its width and a perimeter of 360m.Find its length and width.

Answer 1

What's the formula for the perimeter of a rectangle?

Answer 2

P=(2)(l+w)

Answer 3

That's good :)
We also know that the perimeter is 360, so you can go ahead and replace P with 360...
\[\large 360 = 2(l + w)\]

Answer 4

Now, the length... is equal to twice the width. So what does that tell you about the relationship between l and w?

Answer 5

yes.. but i dont know what is the value for w :D

Answer 6

Well, you know 'length' is TWICE the width.
So you just have to translate that into math-language :P
l = 2w

Answer 7

Does that make sense? Twice the width.. that means multiplying the width by 2.

Answer 8

ok.. wait

Answer 9

have to look for the value of width

Answer 10

answer?

Answer 11

put l=2w in this equation \[360=2(l+w)\]

Answer 12

ok

Answer 13

the answer is 60

Answer 14

good ...now calculate l

Answer 15

ok

Answer 16

thanks

Answer 17

my pleasure...:)

Answer 18

i need help for this

Answer 19

hello

Answer 20

which one?no11?

Answer 21

11 and all numbers in test 2
please... i'm so tired na

Answer 22

need help so bad

Answer 23

11.a) multiply first equation with 4 and multiply second one with 3 and add them..