Question

A marble tile measure 20cm ×12cm?how many tile will be required to cover a wall of size 3cm×4cm?also find the total cost of the tiles at the rate of RS 2 per tile.

Answer 1

if you mean a wall of 3m*4m

then area of tile=20*12=240cm^2
after converting into metre
240/10000=0.0240m^2

area of the wall=3m*4m=12m^2

so tiles required are
12/0.0240=500
the cost of the tiles at RS 2 per tile

500*2=1000