Question

a marble tile measures 25 CM by 20 cm how many times will be required to cover a Wall of size 4 m by 3 m

Answer 1

hii!!

here's ur answer...

given:-

→ length of tile = 25cm

in metres = 25/100

= 0.25m

→ breadth of tile = 20cm

in metres = 20/100

= 0.2m

area of the tile = length × breadth

= 0.25 × 0.2

= 0.05m²

→ given length of the wall is 4m and breadth is 3m.

area of the wall = length × breadth

= 4 × 3

= 12m²

therefore no. of tiles required to cover the wall = 12/0.05

= 240 tiles

hence 240 tiles are required to cover the wall.

hope this helps..!

Answer 2

area of tile = 25cm*20cm = 500cm^2
area of wall = 4m*3m = 400cm*300cm = 120000cm^2
(since 1m = 100cm
therefore 4m = 400cm and 3m = 300cm)
number of tile * area of tile = area of wall
=> number of tiles = area of wall/area of tile
=> number of tiles = 120000/500
=> number of tiles = 240