Circles, SM-Bank 033 Calculate the radius of a circle with a circumference of 870 metres, correct to the nearest ten metres. (2 marks) --- 4 WORK AREA LINES (style=lined) --- Show Answers Only \(140\ \text{m}\ (\text{nearest ten})\) Show Worked Solution \(C\) \(=2\pi r\) \(870\) \(=2\pi r\) \(r\) \(=\dfrac{870}{2\pi}\) \(=138.4648\dots\) \(=140\ \text{m}\ (\text{nearest ten})\)