KARACHI (STAFF REPORTER): Dollar strengthened against rupee in money market on Tuesday, it was traded at highest rate of Rs 102.50 in cash free market. According to the details provided by the Forex Association of Pakistan, dollar traded at minimum rate of Rs 101.95 and highest rate of Rs 102 in inter bank while it was traded at minimum rate of Rs 102.30 and highest rate of Rs 102.50 in cash free market.