Problema Solution
The length of a rectangle is 10 less than 3 times the width. If the perimeter is 140 cm.,what are the dimensions of the rectangle?
Answer provided by our tutors
let 'x' represent the width, then '3x-10' represents the width
perimeter = 2*length + 2*width
140 = 2x + 2(3x-10)
x=20
width = 20
length = 3*20-10=50
The dimensions of the rectangle are 20 x 50.