Question

How many Square tiles of side 30 cm are needed to tile the floor of a room of length 4.2 m and breadth 3 m?
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Answer 1

$\huge\sf\underline{Answer}$

Given :-

• Side of the Square tile = 30cm

• Length of the floor = 4.2m

• Breadth of the floor = 3m

To Find :-

• Area of the Square tile

• Area of the floor

• No of tiles required to tile the floor

Solution :-

Area of the Square tile = ( Side ) ²

By substituting values,

⇒ ( 30cm )²

➱ 900cm²

Floor is in the shape of rectangle so,

Area of the floor = Length × Breadth

By substituting values,

⇒ 4.2m × 3m

➱ 12.6m²

Area of the tile is in cm² so, we convert Area of the floor into cm².

⇒ 1m² = 10,000cm²

⇒ 12.6m² = ( 12.6 × 10,000 )cm²

➱ 126000cm²

∴ The Area of the floor is 126000cm²

Number of tiles required =

⠀⠀⠀⠀$\large\sf{ \dfrac{Area \: of \: the \: floor}{Area \: of \: the \: tile} }$

By substituting values,

$⇒\dfrac{1260\cancel{00}} {9\cancel{00} }$

$⇒ \dfrac{1260}{9}$

$\sf{⇒140}$

Hence, The 140 tiles are required to tile a floor of a room

Answer 2

Answer:

140is the answer you can se in above answer by proof