Question

a painting 40 cm long and 28cm wide is painted on a cordboard such thattheir is a margan of 2cm along each of its side .Find the area of the margin.plz solve quickly

Answer 1

the answer is 70 because when you add 40+28+2 it gives you 40

Answer 2

Area of margin = area of painting - area of inner side .
40×28-[(40-4)(28-4)}
1120-36×22
1120-792
328