Problema Solution
A string is formed into a rectangle with a area of 14cm2 if it is reshaped so that the 2cm side is 2cm longerhow will the area change
Answer provided by our tutors
let
l = the length of the rectangle
w = 2 cm the width of the rectangle
l*w = 14 cm^2
2l = 14
after the reshaping the new sides are
w + 2 = 2 + 2 = 4 cm the width
l - 2 = the length
the area of the new rectangle is
4(l - 2) = 4l - 8 = 2*14 - 8 = 20 cm^2.
the area will increase by 4 cm^2.