Question

A running track consists of two straight sections with semi-circular ends. If the straight sections measure 100 metres and one compete lap on the inside of the track measures 1/2 k, what is the distance x between the two straights?
well, add up the distances. You have two straight sections of 100m and a circle of diameter x, so

2*100 + πx = 500
x = 300/π

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