Question

All the four walls of a room of length 17 m and breadth 23 m are covered with wallpaper. If 1200 sq m of wallpaper is used, what is the height of the room? Correct answer with explanation will be marked as brainiest.No bad answers or else i will report

Answer 1

Answer:

$l = 17m \\ b = 23m \\ height \: = h \: m\\ area \: of \: wallpaper \: = 1200sq \: m$

According to the question,

$= > 2(lb + bh \ + lh ) = 1200 \\ = > 2(17 \times 23 + 23h + 17h) = 1200 \\ = > 2(391 + 40h) = 1200 \\ = > 391 + 40h = \frac{1200}{2} = 600 \\ = > 40h = 600 - 391 = 209 \\ = > h = \frac{209}{40} = \frac{20.9}{4} = 5.225m$

Hope this answer helps you ^_^ !