Question

the diameter of a small circle is d. the diameter of the larger circle is d+1.
a) write an expression that represents the area of the smaller circle in terms of d
b) write an expression that represents the area of the larger circle in terms of d.

Answer 1

area=pi*r^2
so for a) area=pi*(d/2)^2
b) area=pi*((d+1)/2)^2