Number 253 of a series
The area of the red circle is 1. What is the area of the outer circle?
Post your answer in the comments section below.
The area of the red circle is 1. What is the area of the outer circle?
Post your answer in the comments section below.
Skeptical Analysis 
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Are we to assume that the chords connecting the intersections of the small circles with the red circle are diameters of the small circles? Without that, or something similar, I think the problem is under-specified.
The problem when I saw it was much as presented here. You should assume the small circles are 1/2 the diameter of the large circle.