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# Areas watch

1. Could someone pls help me and show me what to do step by step:

A diagram shows the plan of the base wich consists of a rectangle of length 2y meters and width 2x meters and a semicircle of radius x meters which is placed with one side of the rectangle as diameter. The perimeter of the base is 100 meters

A) show that the area a square meters of the base is given by A=100x-2x^2-1/2

I'm not sure if there is something wrong with the question but I just can't do it
2. Can you send the question as an attachment?

3. (Original post by Hajra Momoniat)
Can you send the question as an attachment?
4. (Original post by Mf1999)
Could someone pls help me and show me what to do step by step:

A diagram shows the plan of the base wich consists of a rectangle of length 2y meters and width 2x meters and a semicircle of radius x meters which is placed with one side of the rectangle as diameter. The perimeter of the base is 100 meters

A) show that the area a square meters of the base is given by A=100x-2x^2-1/2

I'm not sure if there is something wrong with the question but I just can't do it
What is the radius of the semicircle?

Can you write an equation involving x and y and the perimeter you have been given?

Can you write an expression for the area in terms of x and y?

Can you eliminate y from that expression?
5. (Original post by Mr M)
What is the radius of the semicircle?

Can you write an equation involving x and y and the perimeter you have been given?

Can you write an expression for the area in terms of x and y?

Can you eliminate y from that expression?
I have tried but I can't seem to be ably to do it
6. (Original post by Mf1999)
I have tried but I can't seem to be ably to do it
You can't find the radius? Can you find the diameter first?

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