Guan Ri Oh's answer to :-)'s Secondary 1 Maths question.

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Guan Ri Oh
Guan Ri Oh's answer
118 answers (Tutor Details)
First of all, I dont know the value of pi given to you. If none is given, you can assume it to be the value in your calculator. Second, the question is not very specific in part b, so I made an assumption that happens to be different from the previous solution.