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12 December, 22:08

Find the length of a track that is a rectangle and two semi circles. Rectangle is 87m long and 65 m wide

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  1. 12 December, 22:26
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    Step-by-step explanation:

    larger radius R=87/2

    smaller radius r=65/2

    larger semi circle=1/2*2*π*R=π*R=π*87/2=87 π/2≈136.6 m

    smaller semicircle = π*r=π*65/2=65 π/2≈102.1 m

    length of track=87+65+136.6+102.1≈390.7 m
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