Question

The length of a rectangle is three times its width and perimeter56m.The length is *




​

Answer 1

Answer:

21m

Step-by-step explanation:

The perimeter of the rectangle is =2(l+b)

The length = 3*width

Let the width be x.

Therefore; Length = 3x

Perimeter=56

=> 2(l+b) =56

=> l+b=28

=>x+3x=28

=>4x=28

therefore x = 7

ie; length= 3*7 = 21.

Answer 2

Answer:

21 m

Step-by-step explanation:

perimeter of a rectangle=2[l+b] or 2*l+2*b

let the width [breadth] be = x

so the length will =3 times width  =3*x = 3x

perimeter = 56m

according to the question = 2[3x+x] = 56m

=2[4x]=8x

8x = 56

56/8 = x

x=7

width=7m

length=3*7=21 m

[this is the answer if this was helpful please mark me as the brilliant]