Question

A circle has an area of x. If the diameter is increased by 50%, what is the area of the resulting circle in terms of x?

Answer 1

Is there a relatively easy way to solve this?

Answer 2

The area of a circle is \[x=\frac{ \pi d^{2} }{ {4} }\]
The diameter changes from d to kd, you can easily calculate the change in x