The least number of square tiles that willbe needed to pave a plot 225

1.	The least number of square tiles that willbe needed to pave a plot 225 m by 30 m is(A) 30 tiles(C) 25 tiles(B) 15 tiles(D) 45 tiles
Answer» The side of the square tile must be a factor of both 225 and 30, so that no tile needs to be cut. For least no. of tiles, the size of the tiles should be maximum.So, the side of the square tiles must be the HCF of 225 and 30 = 15 m Area of plot = 225 * 30Area of tile = 15 * 15 No of tiles = area of plot / are of tile = 30

The least number of square tiles that willbe needed to pave a plot 225 m by 30 m is(A) 30 tiles(C) 25 tiles(B) 15 tiles(D) 45 tiles

Answer»

The side of the square tile must be a factor of both 225 and 30, so that no tile needs to be cut.

For least no. of tiles, the size of the tiles should be maximum.So, the side of the square tiles must be the HCF of 225 and 30 = 15 m

Area of plot = 225 * 30Area of tile = 15 * 15

No of tiles = area of plot / are of tile = 30