Question

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

Answer 1

Let breadth =x
Therefore length = 3x
Perimeter = 84
2( l+b) = 84
2(x+3x) = 84
2x+6x = 84
8x = 84
X = 84/8
X= 21/4
Therefore breadth = 21/4
Length = 3*21/4
63/4