KARACHI-Rupee further strengthened against dollar in money market on Tuesday. Dollar traded at the lowest rate of Rs 102.75 in cash free market. According to the details provided by the Forex Association of Pakistan, dollar traded at minimum rate of Rs 101.75 and maximum rate of Rs 101.81 in inter bank while it was traded at lowest rate of Rs 102.75 and highest rate of Rs 102.95 in open market.