Ok, so the link attached shows my answer with working out, the textbook's answer and the question. If someone could explain if my answer is correct or if the textbook's answer is correct?
https://i.stack.imgur.com/9rMEP.jpg
thanks
2026-04-13 23:52:55.1776124375
Calculate the area of a sector of a circle? [My answer is different to the textbook answer, who is correct?]
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The answers differ by a factor of $\pi$.
Looks like when they computed the answer they forgot to multiply by $\pi$.