Bunuel wrote:
If the number of square units in the area of a circle is A and the number of linear units in the circumference is C, what is the radius of the circle?
(1) A/C = 3/2
(2) A > C + 3
Let 'r' be the radius of a circle. Then its area, A = π*r^2 and its Circumference C = 2*π*r.
Statement 1Ratio of A:C = A/C = (π*r^2)/(2*π*r) = r/2
This is given to us as 3/2. Equating r/2 = 3/2 or r=3.
Sufficient.
Statement 2A > C + 3
π*r^2 > 2*π*r + 3 or π*r(r-2) > 3
This will not help us in calculating r.
Not sufficient.
Hence
A answer