A marble tile measures 25 cm by 20 cm. How many tiles will be required to cover a wall of size 4m by 3m. ?

Given, length of tile = 25cm

and breadth of tile = 20cm

Therefore, area of one tile = length × breadth = 25 cm × 20 cm = 500 cm2

Now, length of wall  = 4 m = 400 cm  [using 1 m = 100 cm]

and breadth of wall = 3 m =300 cm

Therefore, area of wall = 400 cm × 300 cm = 120000 cm2

Now, number of tiles required = area of wall/ area covered by 1 tile on the wall

  • 22

  tile    wall

length =25cm  length =4m = 400cm

breadth =20cm breadth = 3m =300cm

area = l*b =25 *20  area =l*b =400*300

  =500sq cm  =120000sq cm

no.of tiles =  area of wall/ area of tile = 120000/500

  =240 tiles

  • 6
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