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tricky Maths question

Hi, could anyone help with this question? The answer is 4

“A 5p coin is circular with diameter 18mm
The coin is placed so that is lies within a square of side 2cm
What is the area in mm^2 of the region where the centre of the coin could be?”
Reply 1
Think about the height and width of the square compared to the diameter of the coin. What is the difference ?
You would be able to move the coin left and right, up and down from the centre of the square and still remain in it.
The vertical distance that can be moved multiplied by the horizontal will give you your answer.
Reply 2
Original post by Euapp
Think about the height and width of the square compared to the diameter of the coin. What is the difference ?
You would be able to move the coin left and right, up and down from the centre of the square and still remain in it.
The vertical distance that can be moved multiplied by the horizontal will give you your answer.


So essentially

20 - 18 = 2
2 x 2 = 4?
Reply 3
Original post by subbhy
So essentially

20 - 18 = 2
2 x 2 = 4?


Exactly
Reply 4
Original post by Euapp
Exactly


Ah didn’t think of it like that! Thanks
Reply 5
Original post by subbhy
Ah didn’t think of it like that! Thanks


You’re very welcome ☺️

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