Josephine is sailing near the radar buoy that can detect anything within 8 km of buoy. She begins sailing from the point 7 km WEST and 9 km SOUTH of buoy. She sails NORTH for 1 hour, then turns and sails EAST for 30 km. She sails at the constant speed of 6 km/hr. Determine how much time was she within 8 km of buoy?