Question

the length of a rectangle is three times its width. It perimeter is 84 m,find the length of the rectangle

Answer 1

Hey there Anthony's got ur answer

Let width be x.

Length be 3x.

Perimeter = 84 m

Perimeter of Rectangle = 2( l + b)

➡️ 84 = 2 (3x + x)

➡️ 84/2 = 4x

➡️ 42 = 4x

➡️ x = 42/4

➡️ x = 10.5

Width = 10.5m

Let width = 31.5m

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Answer 2

Hey friend! Here is your answer.

Let breadth be b and length be l.

l = 3b

Perimeter = 84m

2(l+b)=84

2(3b+b) = 84

2×4b= 84

8b = 84

b= 10.5m

length =3×10.5

=31.5 m