A running track is shaped like a rectangle 90 m long and 28 m wide with a semicircle attached to each of its two 28 m ends. Find the distance covered in one lap round the outside of the track, in m. Take π = 22/7.

A lap runs along the two 90 m straight sides and round the two curved ends, and those two ends together make one whole circle of radius 14 m. Distance = $2\times 90+2\times (22/7)\times 14=180+88=268$ m. (The two 28 m ends are never run along — counting them as well gives 324 m; using 28 m as the radius gives 356 m.)