How many tiles whose length and breadth are 13 cm and 7 cm respectively are needed to cover a rectangular region whose length and breadth are 520 cm and 140 cm?
Select the Correct Answer:
50 tiles
1000 tiles
80 tiles
800 tiles
Correct Choice:
800 tiles
As we know,
Area of rectangular tiles = length × breadth
● 13 × 7= 91 cm²
The area of rectangular tiles is 91cm²
Area of rectangular region = length × breadth
● 520 × 140 = 72800cm²
Now, we have to find the numbers of tiles :
Number of tiles = Area of rectangular tiles - Area of rectangular region
● 72800 / 91= 800
Hence, 800 tiles are required to cover the region.