KARACHI - Dollar took further strength against rupee in inter bank and cash free market on Tuesday. It was traded at the highest rate of Rs 100.70 in inter bank. According to the data provided by the Forex Association of Pakistan, dollar traded at the lowest rate of Rs 100.60 and highest rate of Rs 100.70 in inter bank while the US currency traded at minimum price of Rs 100.35 and maximum price of Rs 100.55 in cash free market.