Question

How many square metre of Glass will be required for windows which has 10 Paints each measuring 25 CM by 16 cm

Answer 1

Length of the window pane = 25 cm and breadth = 16 cm
Area of one window pane = 25*16 = 400 sq cm
Area of 10 such window panes = 400*10
Area of 10 window panes = 4000 sq cm
Since 1 sq m = 10000 sq cm
So, required glass for 10 window panes = 4000/10000
= 0.40 sq m
Answer.

Answer 2

No. of pans in window = 10
Measurement of 1 pan = 25 * 16 cm = 0.25 * 0.16 m

Therefore, area of all pans(window) = (.25 * .16) 10
=> 0.04 * 10
=> 0.4 m sq