Question

a floor measuring 2 metre by 1.5 m is to be covered with the tiles measuring 25 cm × 25 CM find the number of the required tiles to cover the floor and the cost of the tiles at ₹ 420 per dozen

Answer 1

Area of Floor = l x b

Area = 2 x 1.5 m^2

Area = 3 m^2

Now,

Area of tiles = L x B

Area = 0.25 x 0.25 m^2

Area = 0.0625

Again,

Number of tiles = Area of Floor/Area of tiles

=> No. of tiles = [3/0.0625)]

=> No. of tiles = 48

Hence,

Cost of 1 dozen tiles = Rs 420
In 48 tiles = 4 dozen

Cost of 4 dozen = Rs [4 x 420]

=> Cost = Rs 1680



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