Mr. ′X′ is having a commercial building of 20,000 sq.ft. situated in a plot of 10,000 sq.ft. He wants to sell one shop of 1,000 sq.ft. to Mr. ′Y′. He approaches a valuer to suggest him the UDS of land of the shop for the purpose of executing a sale deed in favour of ′Y′. The common area percentage is 10%. What is the UDS of land?