This task is about circumference and perimeter.
The grounds keeper has just painted a line for the inside of the Marston Athletic Track.
The line he painted is shown in the diagram below. The two end sections are semi-circles with a radius of 35 metres (m).
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a) Show how to work out the total length of the two curved sections of the line.
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b) The length of the line is 400 metres. Show how to work out how long each straight section will be.
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