KARACHI : Further growth witnessed in US dollar on first day of trading week as dollar traded at highest price of Rs 105.72 in cash-free market.  According to the data provided by Forex Association of Pakistan, US dollar traded at lowest rate of Rs 105.67 and highest rate of Rs 105.72 in inter bank while the lowest rate of it in cash-free market was 105.50 and highest was Rs 105.60.