Question

A marble tile measure 15cm ×20cm.How many tile will be required to cover a wall of size 4m×6m if you lay the 15cm side along the 6m wall?

Answer 1

firstly, if we put 15 cm along side 6m we get the number of tiles along the 6m
that is, 600cm/15cm
we get 40 tiles along 6m
now similarly we have to put 20cm along 4m
we get, 400cm/20cm
that is 20 tiles

now we get a 40*20 tiles structure
that is 800 tiles.

also, (400×600)/(15×20)
it is 800 tiles