Madhya Pradesh Police Exam Model Paper 7

Given:
Length of rectangular field = 32 cm
Breadth of rectangular field = 20 cm
Length of tile = 4 cm
Formula Used:
Area of square = side × side
Area of rectangle = length × breadth
Calculations:
Length of rectangular field $=32\mathit{c}\mathit{m}$
Breadth of rectangular field $=20\mathit{c}\mathit{m}$
Length of tile $=40\mathit{c}\mathit{m}$
⇒ Area of rectangular field $=\left(32\times 20\right)=640\mathit{c}{\mathit{m}}^2$
Area of each tile $=\left(4\times 4\right)=16\mathit{c}{\mathit{m}}^2$
⇒ Number of tiles $=\left(640/16\right)=40$
∴ The number of square tiles used to cover the rectangular field is 40.