Question

Find the height of a wall whose length is 8 m and which is covered by 1760 tiles of size 25 cm by 20 cm.​

Answer 1

Step-by-step explanation:

Let the height of the room be x meters.

∴ its breadth =2x meters

∴ Area of the four walls =2×x(18+2x)=36x+4x2

⇒36x+4x2=2×2×70

⇒x2+9x−70=0

⇒(x+14)(x−5)=0

⇒x=5

Breadth =2×5=10m

Area of the floor =18×10=180 sq.meter

Cost of paving the floor =180×20=Rs.3600