Question

How many tiles mesuring 20 cm × 20cm each will be required to pave a 1.5 m wide foothpath around a grassy plot of 25 m × 16m

Answer 1

Let us take the length of the plot as 25m
and the breadth of the plot as 16m.

We require a footpath of 1.5m around it

Therefore, The length will be 25m + (1.5+1.5) = 27m
The breadth will be 16m + (1.5+1.5) = 19m

Now, Area of grassy plot = 25m x 16m = 400m²
Area of footpath including grassy plot = 27m x 19m = 513m²

Therefore, area of footpath = 513m²- 400m²
= 113m²
We need 5 tiles to make 1m²
Then how many do we need to make 113m²
Therefore, 113m² x 5 tiles = 565 tiles