Question

The length of a rectangle is three times its width and its perimeter is 40, then the length is?

Answer 1

Answer:

length is 15

Step-by-step explanation:

let width be x

length is 3x

2(x+3x)=40

2(4x)=40

4x=40/2=20

4x=20

x=20/4

x=5

width x=5

length 3x=5×3

=15

Answer 2

Let width be x , then lenght will be 3x

Perimeter = 2(l+b)

40 = 2(x+3x)

40 = 2× 4x

4x= 40/2

4x=20

x= 20/4

x=5

Now, Width=x=5

Length=3x=3×5=15

I don't know whether it is cm or m .

Put it by your own.

Hope it helps you

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