KATHMANDU, Sept 20: How long will it take to cover the distance of 19 km from Ratnapark to Suryavinayak by public transport? There is no definitive answer; it can take up to one to one and a half hours. It takes even more time during office hours. However, now there will be some certainty in this road section. On the occasion of Constitution Day, the government has operated express bus service on the Suryavinayak-Ratna Park road section from Wednesday.