Question

40 cm long and 28 cm wide is painted on a cardboard such that there is a
A painting 40 cm long and 28 cm wide
margin of 2 cm along each of its sides. Find the total area of the margin.
THE ANSWER IS 288CM SQUARE AT THE BACK OF MY BOOK​

Answer 1

$\huge\mathfrak{hello...!!}$

refer the attachment