Question

The area around the rectangular pool is to be paved for a distance of three metres out from the edge of the pool. Each paving block is a square with sides of 0.5 metres. How many blocks needed?

In my hw book, the diagram has a rectangle, and the width is 2metres, and the length is 3.5metres, and all 4 sides outside of the rectangle is paving blocks.

Please help

Answer 1

so, the lengths of the sides of the paved pool are 3m longer than the dimensions of the pool. That is, 5 by 6.5
Since each tile is only 1/2 meter, that will be 10 by 13 tiles
The perimeter is now 2(10+13) = 52 tiles

Answer 2

As it's 3 meters around the pool, we should add 6 to both width and length.
so the total of blocks + pool is (2+6)*(3.5+6)=76, and the area of pool is 2*3.5=7, 76-7=69 which is the area of blocks. The paving blocks has an area of 0.5*0.5=0.25
The total area needed to be paved/ the area of one block = # of blocks
69*4=276 blocks needed.

btw, the question sounds unreasonable, the paved blocks have a much larger area then the pool.