A room is 6.8 long 42m wide and 35 height the room has two glass floor each measuring 15cm by 25 cm and a glass window measuring 400cm by 1.25 m .The walls are to be painted except the windows and doors .Find the area of floor walls
you really need to improve your diction or your typing. That mish-mash you posted is almost too annoying to try and interpret.
Total area: 2(6.8+4.2)*3.5 = 77 m^2
I took the liberty of not believing your room was really 42m long and 35m high!
Two doors: 2 * 15*25 = 750 cm^2
Are these dog doors? I'll let you adjust the measurements as you see fit.
Window: 4.00 * 1.25 = 5 m^2
So now, just subtract the door and window areas from the total wall area. I assume you can get at least that right ...