Attracting more investment and boosting workers' productivity could help South Asian nations cut poverty rates to single digits in less than a decade, says the World Bank in Economic Growth in South Asia, released on Tuesday. But governments must ensure that the cut is not accompanied by a growing gulf between nations' haves and have-nots, warns the bank. Accelerating growth to 10 percent a year until 2015 would reduce poverty rates to single digits and also reduce the number of South Asians living in poverty by two-third. In Nepal, 10 percent growth would produce a 9.4 poverty rate by 2015. In 2003 poverty here was estimated at 31 percent, said the Bank.