Question

How many square meter of class will be required for a window which has 12 window panes each pane measuring 25 cm by 16 cm?

Answer 1

the area of one window pane= 25×16
=400cm sq.
so area of 12 window panes = 400 cm sq. × 12
=48000 cm sq.

Answer 2

$\bigstar$ Given:

• Length of the glass pane = 25 cm
• Breadth of the glass pane = 16 cm
• No. of panes = 12

$\bigstar$ To Find:

• Square meters of glass will be required for the window.

$\bigstar$ Solution:

We know that,

Area of rectangle = Length $\times$ Breadth

Area of one glass pane = $25\:cm \times 16\: cm$

$\implies 400^{2}$

$\boxed{1\: m^{2} = 10000 \: cm^{2} }$

$\implies 0.04 \: m^{2}$

Area of 12 panes  $=12 \times 0.4 = \boxed{\underline{\underline{0.48 \: m^{2} }}}$

Thus, area of 12 panes is 0.48 square metres.