C2 WJEC June 2013 Q9

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You're an absolute legend. Thanks, this channel is so cool

ojm
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Apologies to do this again, but in the last part of arc length, you multiplied your answer of 3/4 by 3/4, as opposed to 7.2. Just thought id give you a heads up that the answer should be 5.4cm! Cheers for the rest nonetheless!

The_Spctr