Answer:
About 9,346.2 mm²
Explanation:
First, find area of the smaller circle and the larger circle.
[smaller]
πr²
π25²
Around 1,963.5
[larger]
π60²
Around 11,309.7
[find shaded region]
Larger / shaded - smaller = around 9,346.2 mm²
4.5m questions
5.7m answers