Question

Ham a rectangular slabs of 10cm × 8 cm are required to cover the floor of hall of 12m ×10m

Answer 1

Answer:

150 Slabs are required to cover the floor.

Step-by-step explanation:

Given :

Dimension of slab = 10cm × 8cm

Hall's dimensions = 12m × 10m

To find :

The number of slabs required to cover the floor

Solution :

Number of Slabs = Area of hall / Area of each slab

★ Area of hall -

Area = Length × Breadth

Convert m into cm

⇒ 120 × 100

⇒ 12000 cm²

Area of hall = 12000 cm²

$\rule{300}{0.5}$

★ Area of slab -

Area = Length × Breadth

⇒ 10 × 8

⇒ 80 cm²

Area of one slab = 80 cm²

$\rule{300}{0.5}$

★ Number of slabs required -

⇒ 12000 / 80

⇒ 150

Slabs required = 150

$\therefore$ 150 Slabs are required to cover the floor.

Answer 2

Answer:

• 150 Slabs are required to cover the floor.

Given :

• Sides of rectangular slabs are 10cm × 8 cm

• Sides of the floor of hall are 12m ×10m

To find :

• Number of slabs are required to cover the floor =?

Step-by-step explanation:

Area of hall = Area of rectangle = Length × Breadth

➮ 120 × 100 [in cm]

➮ 12000 cm²

Area of hall = 12000 cm²

Area of a slab = Area of rectangle = Length × Breadth

➮ 10 × 8

➮ 80 cm²

Area of a slab = 80 cm²

Number of required slabs = Area of hall / Area of a slab

Substituting the values in the above formula, we get,

➮ 12000 / 80

➮ 150

Thus, 150 Slabs are required to cover the floor.