9. We read in the various newspapers that during the period from June, 2009 to September, 2010, the Ministry of Road Transport and Highways has achieved a target of constructing on an average 12.01 km of National Highways per day. However, this achievement is shorter compared to the target of constructing 20 km of Highways per day. To achieve this target, it is essential that at any given point of time approximately __________ of works are under way. Which among the following fills the blank correctly?