Question

How many square tiles of side 9 cm will be needed to fit in a square floor of a bathroom of side
720 cm? Find the cost of tiling at the rate of 7.50 per tile.​

Answer 1

Answer:

Side of square of tile =9cm

Area of a square tile =Side×Side

=(9×9) cm 2

=81 cm2

Side of a square floor =20 cm

Area of square floor =Side×Side

=(20×20) cm2

=400 cm2

No. of tiles required to lift in a floor =

Area of square tile/Area of square floor.

=

81/400

=4.93

≅5

Cost of one tile =Rs.7.50

Cost of 5 tiles =Rs.(7.50×5)

=Rs.37.50

∴ No. of tiles required =5

Cost of tiling =Rs.37.50

Step-by-step explanation:

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Answer 2

$\huge\underline\blue{\textbf{Required Answer:-}}$

$\huge\underline\green{\textbf{Given :-}}$

• The bathroom in which square tiles are to fit is of the shape of a square.
• $\sf\underline\purple{\textbf{Side of the tiles = 9 cm}}$
• $\sf\underline\pink{\textbf{Side of the bathroom = 720 cm}}$
• $\sf\underline\green{\textbf{Cost of one tile = 7.50 Rs.}}$

$\huge\underline\red{\textbf{To find :-}}$

• How much tiles to fit in the given area.
• Total cost of tiling.

$\huge\underline\blue{\textbf{Solution :-}}$

Area of one tile = Side × Side

: ⟹ Area of one tile = 9 × 9

: ⟹ Area of one tile = 81 cm sq.

Area of the bathroom = Side × Side

: ⟹ Area of the bathroom = 720 × 720

: ⟹ Area of the bathroom = 518400 cm sq.

No. of tiles required to fit in the bathroom = ${\frac{Area of square floor}{Area of square tile}}$

${= \frac{518400}{81}}$

= 6400 tiles

Cost of one tile = Rs. 7.50

Cost of 6400 tiles = (7.50 × 6400)Rs.

= Rs. 48000

$\huge\underline\purple{\textbf{Answers :-}}$

$\sf\underline\green{\textbf{Square tiles needed to fit in the square floor}}$ $\sf\underline\green{\textbf{= 6400 tiles.}}$

$\sf\underline\green{\textbf{Total cost of tiling = Rs. 48000}}$

$\huge\underline\red{\textbf{Hope it helps...}}$