A square garden has an area of 2500sq.m. A part of uniform width of 2.5m runs around it on the inside. Find the cost of laying it at Rs.25 per sq.m.
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area on outside 2500 sq'm 'side√2500=50 side on the inside50-5=45 area=45×45=2025 area of laying 2500-2025=475 cost=475×25=R's 11875
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