Question

How many square metre of glass will be required for a window, which has 12 panes, each measuring 25cm by 16cm

Answer 1

area of each window pane= l X b = 25 x 16 = 400 cm sq..
area of 12 window panes = 400 x 12 = 4800 cm sq.
 which is equal to 0.48 m sq. thus , 0.48 m sq. glass will be required for the    window.

Answer 2

Answer:

0.48 sq.m.  

Step-by-step explanation:

Length of pane = 25 cm

Width of pane = 16 cm

Area of pane = $Length \times width$

                      = $25 \times 16$

                      = $400 cm^2$

So, area of 1 pane = 400 sq.cm.

Area of 12 panes = $400 \times 12$

                            = $4800 cm^2$

$1cm^2=0.0001m^2$

$4800 cm^2=0.0001 \times 4800 m^2$

$4800 cm^2=0.48 m^2$

Hence 0.48 sq.m.  of glass will be required for a window, which has 12 panes, each measuring 25 cm by 16 cm .