Answer :
Length=10m
breadth=6m
height=3m
Area of a wall=2(lb+bh=hl) -lb=216-60=156m²
cost of paint of 1 m²=75Rs
cost of 156 m²=75x156=11700Rs
AREA OF 4 WALLS + ROOF= 2[BH+HL] +LB
AREA = 2[6*3+3*10]+10*6
AREA=2[48]+60
AREA=156 M ^2
AREA EXCLUDING DOORS AND WINDOWS =156-6
=150 M ^2
TOTAL COST = 150*75
=RS. 11250
AREA = 2[6*3+3*10]+10*6
AREA=2[48]+60
AREA=156 M ^2
AREA EXCLUDING DOORS AND WINDOWS =156-6
=150 M ^2
TOTAL COST = 150*75
=RS. 11250