বৃত্তের মধ্যে আয়ত | Math Problem

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I figured out it is 48 + r^2
But what next? How to find the r?
Any hint pls

@arifariffulislam6162 figure out DC. calculate the area of the circle using AC. multiply the area by 1/4. calculate the area of the rectangle. finally , calculate (1/4 * Area of circle - area of rectangle). and the rest is just basic understanding.

I don’t understand. How do you figure out the area of the circle? AC or DC isn’t the r

Nvm i finally got it. I overlooked the fact that Bd is the r and so 5. Such a clumsy job by me lol

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lol easy peasy ans is 73

give AC = 5 that means radis ..

area of 1/4 of the circle - area of rectangle …

comparing solution…

a = 25

b = 48

a+ b = 73

explain the whole thing for me pls?