Is 847.20 feddans as big as Alcatraz?
It's about 40 times as big as Alcatraz
The size of Alcatraz is about 21 feddans.
(a.k.a. The Rock) (California)
Alcatraz Island measures 21 feddans. It is known a part of the Golden Gate National Recreation Area, and has historically served as a lighthouse, fort, military prison, and — most famously — a federal prison.
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