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

Answers

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
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.

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