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GB-26-06-001 · Reverse circle area

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The area of a circle is 3025π3025\pi cm². Find its diameter.

Reverse Circle Area Booklet p. 28 & p. 83
Method
1) Set πr² = given area and cancel π
2) Square root to find radius r
3) Double r to find diameter d = 2r
Worked Example (GB-26-06-001)
1)
r² = 3025, so r = 55.
2)
110 cm
Ans = 110 cm