The coordinates of centre of a circle are (4,3) and radius is 5. (x,y) is a point on the circle. The equation of the circle is :
A(x-4)² + (y-3)² = 25
Bx² - y² = 25
C(x-3)² + (y-4)² =25
D(x-4)² + (y-3)² = 5
A(x-4)² + (y-3)² = 25
Bx² - y² = 25
C(x-3)² + (y-4)² =25
D(x-4)² + (y-3)² = 5
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The area of a circle is increased by 22 cm2 when its radius is increased by 1 cm. The original radius of the circle is