Question

Hameed has built a cubical water tank with a lid for the house, with each outer edge

1.5m long. He gets the outer surface of the tank excluding the base, covered with square

tiles of side 25cm (Figure above). Find how much he would spend on tiles if the cost of

tiles is Rs.350 per dozen.​

Answer 1

Answer:

The length of the each side of water tank =1.5m=150cm

As it is given that base is not covered with tiles so, five sides of the tank are  

covered with tiles.

Therefore,

Surface area of water tank =5a  

2

=5(150)  

2

=112500 cm  

2

 

Side of tile =25 cm

Area of tile =25  

2

=625 cm  

2

 

Number of tiles to cover five sides of the tank =  

625

112500

​

=180

Now,

Cost of one dozen tiles =Rs.360

Hence, total cost of 180=  

12

360

​

×180=Rs.5400