My solution and my book's solution don't match.
Is something wrong with the my solution?
If so, where and why?
My book says:
The radius r of a circle increases by 50%.
In terms of r, what is the area of the circle
with the increased radius?
My solution:
- A = πr2 => Area of any circle
- ir = 3r/2 => Increased radio
- A ir=πir2 => Area of circle with increased radio
- A ir=π(3r/2)2 => Substituting ir with its value
- A ir=π(9r2/4) => Square
- A ir= (9πr2)/4 => Result
Is the In terms of r tricky?
Answer
There is nothing wrong with your answer!
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