Correct Answer - Option 3 : 80,000
Given:
Side of square tile = 4.5 cm
Length of room = 18 m
Breadth of room = 9 m
Formula Used:
Area of rectangle = Length × Breadth
Area of square = Side × Side
Number of tiles = Area of Room/ Area of 1 tile
Calculation:
1 m = 100 cm
4.5 cm = 4.5/100 m
Area of rectangle = Area of room = Length × Breadth
⇒ Area of room = 18 × 9
Area of tile = Area of square = Side × Side
⇒ Area of tile = (4.5/100) × (4.5/100)
Number of tiles = (18 × 9)/[(4.5/100) × (4.5/100)]
⇒ Number of tiles = 80,000
∴ 80,000 tiles would be required.
The correct option is 3 i.e. 80,000
