Problema Solution
An envelope is 4 cm longer that it is wide. the area is 77 cm^2 Find the length and the wdth
Answer provided by our tutors
let 'x' represent the width in cm, then 'x+4' represents the length
area = length * width
77 = x(x+4)
solving for 'x' we have a positive value of x=7
7+4 = 11
the width is 7 cm, the length is 11 cm