Question

A door of dimensions 3m * 2m is on the wall of dimension 10m *10m. Find the cost of painting the wall if rate of painting is rs 2.50 per sq.m

Answer 1

WE ARE ACTUALY PAINTING THE AREA OF THE WALL,BUT WE DO NOT PAINT THE DOOR,
THE AREA OF THE WALL INCLUDING THE DOOR IS 10*10=100 M SQUARE
THE AREA OF THE DOOR
=3*2=6 M SQUARE
SO THE AREA OF THE WALL ALONE EXCLUDING THE DOOR IS
=100-6=94 M SQUARE
SO THE AREA OF THE PORTION TO BE PAINTED=94 M SQUARE
IT IS SAID THAT IT TAKES 2.50 RS TO PAINT 1 M SQUARE AREA,
SO IT TAKES 94*2.50=235 RS TO PAINT THE WALL