A circular stadium consists of sections as illustrated, with aisles in between. The diagram show the tiers of concrete steps for the final section, Section K. Seats are to be place along every step, with each seat being 0.45cm wide. AB, the arc at the front of the first row is 14.4m long, while CD, the arc at the back of the back row is 20.25m long.
1) How wide is each concrete step?
2) What is the length of the arc of the back of Row 1, Row 2, Row 3, etc.?
3) How many seats are there in Row 1, Row 2, Row 3, ……, Row 13?
4) How many sections are there in the stadium?
5) What is the total seating capacity of the stadium?
6) What is the radius of the ‘playing surface'?
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