Question

A marble tiles measures 15cm × 20cm how many tiles will be required to cover a wall of size 4m ×6m if you lay the 15cm side along the 6m wall.

Answer 1

Hello sir , 

here it is mentioned that A marble tiles measures 15cm × 20cm  = 300 but 

sir we have to make our quantity in metrs 
which means = 300/10000 = 0.03 

However sir if we cover the wall, we will require the following no. of minimum

pieces. which means sir , 

if you lay the 15cm side along the 6m wall. then requried no will be 

6×4 / 0.03 which equals to 800 tiles sir   

hope this helps you 

regards brainly helper ! 

Answer 2

size of the each marble
l=15cm, b=20cm
measurements of the wall
if we lay 15cm marble border along side 6m wall
L=4m+15cm=415cm
B=6m =600cm
let the number of marbles required =n
n=(L×B)/(l×b)

=(415×600)/(15×20)
=830
Therefore 830 marble tiles required