SOLUTION: Question A swimming pool 25 m by 10 m has a concrete border all round. Find the area of the concrete border if it is 2.5 m wide at the sides and 5 m at the ends. I wonder h

Question 41793: Question
A swimming pool 25 m by 10 m has a concrete border all round. Find the area of the concrete border if it is 2.5 m wide at the sides and 5 m at the ends.
I wonder how does the diagram will look like ? Besides, I do hope you can help me to solve this. Thanks a lot.
Answer by psbhowmick(878) (Show Source): You can put this solution on YOUR website!

Rectangle ABCD represents the swimming pool.
Rectangle EFGH represents the swimming pool surrounded by the concrete path.
AB = CD = 25 m and BC = DA = 10 m
EF = GH = 25 + 2x5 = 35 m and FG = HF = 10 + 2x2.5 = 15

Area of the outer rectangle = 35 x 15 = 525 .
Area of the inner rectangle = 25 x 10 = 250 .
So, area of the concrete border = 525 - 250 = 275 .
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