Question

the lenght of a rectangle is three timmes its width . if the perimeter is 84 m find the length of the rectangle

Answer 1

Answer:We have,

Let, width=xm

∴3xm

Given, rectangle=84m

2(length+width)=84

2(3x+x)=84

2×4x=84

8x=84

x=

8

84

​

x=

2

21

​

x=10.5m

Width of rectangle, x=10.5m

Length of rectangle 3x

=3×10.5m

=31.5m

Hence, this is answer.

Answer 2

Answer:

We have,

Let, width=xm

∴3xm

Given, rectangle=84m

2(length+width)=84

2(3x+x)=84

2×4x=84

8x=84

x= 84

8

x= 21

2

x=10.5m

Width of rectangle, x=10.5m

Length of rectangle 3x

=3×10.5m

=31.5m

Hence, this is answer.

Explaination:

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