In a group of 20 there are 7 boys what is the ratio of girls to boys?
1 answer:
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First compute the area of the rectangle:
We have to find the radius of the circle:
circonférence of circle given radius is:
We get the equation:
Solving the above equation for r we get:
Compute the area of the circle like this:
The white area is the difference of the area of the rectangle and the area of the circle:
We have to find the radius of the circle:
circonférence of circle given radius is:
We get the equation:
Solving the above equation for r we get:
Compute the area of the circle like this:
The white area is the difference of the area of the rectangle and the area of the circle: