the dimension of a room are 20m x 15m x 12m the area of 4 walls and ceiling the be painted is
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the dimension of a room are 20m x 15m x 12m the area of 4 walls and ceiling the be painted is
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length= 20m
breadth= 15m
height= 12m
area to be painted = area of four walls+ top area
= 2 (l+b)×h+ lb
= 2 ( 20m+15m)×12m+ 20m×15m
2 (35m)×12m+ 300m^2
70m×12m+300m^2
840m^2 +300m^2
1140m^2