Question

Find the number of square tiles of size $12cm$ required for decorating a wall $7.2m\times 3m$.Also,find the cost of the tiles required for this purpose if one tile costs $₹2.50$.

Answer 1

Step 1.Given measures

Length of wall $=7.2m$

$=7.2\times 100cm$

$=720cm$

Breadth of wall$=3m$

$=3\times 100cm$

$=300cm$

Sides of square tile$=12cm$

Cost of one tile$=₹2.50$

Step 2.Finding area of wall

Area of rectangle$=720\times 300$

$=216000c{m}^2$

Step 3. Finding area of a square tile

Area of square$=12\times 12$

$=144c{m}^2$

Step 4.Finding the number of tiles required for decorating the wall

Number of tiles$=\frac{Areaofrec\tan gularwall}{Areaofsquretile}$

$=\frac{216000}{144}$$=1500$

Therefore $1500$ tiles are required for decoration.

Step 5.Finding the cost of tile required for decoration

Cost$=Numberoftile\times \cos tofonetile$

$=1500\times 2.50$

$=₹3750$

Hence the number of tiles required for decorating wall is $1500$.And the cost of tiles required for decorating the wall is $₹3750$