The area of sport center is 9720 sq.m. The ninth part of all territory is occupied by the enclosed space, the football field - 7140 sq.m, and the rest - the open areas. What space is occupied by the open areas.

9720/9=1080 7140+1080=8220 9720-8220=15009720:9*1=1080 sq.m occupy the enclosed space 9720-1080-7140=1500ΠΌ2 the open areas
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