Question

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

Answer 1

Answer:

here is the answer

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Answer 2

Let length of rectangle be 'l meters' ,

width of rectangle be 'b meters' .

According to the question,

l = 3b

perimeter of rectangle = 84m

=> 2(l+b)=84

=> ( l+b )=42

=> 3b+b =42

=> 4b=42

=> b=42/4

=21/2 = 10.5 m

:. Lenght = 3(21/2)

= 63/2

= 31.5 m