Question

the length of a square room is 12m. Square tiles of length 25cm are to be fixed on its floor. How many tiles will be required? Find the cost of fixing the tiles at the rate of rs20 per sq m.

Answer 1

Area of the square room = 1200×1200=1440000

Area of the square tile=25×25=625
so,tiles required=224
total cost= Rs 2880

Answer 2

Length of square room = 12m = 1200 cm

Length of square tile = 25 cm

Area of room = 1200^2 = 1440000 cm^2

Area of 1 tile = 25^2 = 625 cm^2

Number of tiles Required = 2304

Now,


Cost of 1 m^2 = Rs 20

=> Cost of 1 cm^2 = 20 / 10000

=> Cost of 1440000 cm^2 = 1440000 × 20 / 10000

= 144 × 20

= Rs 2880