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in Perimeter and Area of Plane Figures by (32.3k points)
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A rectangular hall is 12 m long and 6 m broad. Its flooring is to be made of square tiles of side 30 cm. How many tiles will fit in the entire hall? How many would be required if tiles of side 15 cm were used?

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Area of the rectangular hall = length × breadth 

= 12 × 6

= 72 sq. m. 

Side of the square shaped tile = 30 cm

∴ 800 square shaped tiles of 30 cm side will be required. 

If the side of the square is reduced to half, its area will become 1/4 times the original.

i.e. number of tiles required will become 4 times the original tiles.

∴ Number of tiles required = 4 × number of tiles of side 30 cm 

= 4 × 800 

= 3200

∴ 3200 square shaped tiles of 15 cm side will be required.

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