Réponse:
Given length of the glass pane = 25 cm Breadth of the glass pane = 16 cm We know that area of rectangle = length x breadth Area of one glass pane = 25 cm x 16 cm = 400 cm2 = 0.04 m2 [Since 1 m2 = 10000 cm2] Thus, Area of 12 panes = 12 x 0.04 = 0.48 m2