SOLUTION: A swimming pool company constructs rectangular pools each 4m wide and 5m long. There are non-slip square tiles, 50cm by 50cm, which can be used for external edging around the pool

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Question 899363: A swimming pool company constructs rectangular pools each 4m wide and 5m long. There are non-slip square tiles, 50cm by 50cm, which can be used for external edging around the pool where the swimmers walk. How many tiles are needed for one row of tiles bordering the entire perimeter of the pool?
Found 2 solutions by mananth, josgarithmetic:
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
length of pool = 5 m = 500 cm
for each length you need = 500 /50 = 10 tiles
on both sides = 20 tiles
Width 4 meters = 400 cm
no of tiles for each width = 400/50 = 8 tiles
For both sides = 16 tiles
The four corners will require 4 tiles
So total tiles = 20+16 + 4= 40 tiles.
A new approach to the problem

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Edging Plus Horizontal Pool Area, %284%2B2%2A%281%2F2%29%29%285%2B2%281%2F2%29%29
Horizontal Pool Area, 4%2A5
Edging Area, %284%2B2%2A%281%2F2%29%29%285%2B2%281%2F2%29%29-4%2A5
-
Continue finding the edging area:
%284%2B1%29%285%2B1%29-4%2A5
4%2A5%2B4%2B5%2B1-4%2A5
4%2B5%2B1
10----just the edging area around the pool.

ONE tile is %281%2F2%29%281%2F2%29 square meters, or 1%2F4 square meters.

How many of these tiles fit into the 10 square meter area?
highlight_green%2810%2F%281%2F4%29=highlight%2840%29%29 tiles.