Question: time taken by rajdhani from delhi to mumbai
Answer: However , after the electrification of the route , the speed of the train improved and as of 2016 , it takes 15 hours and 35 minutes when operating as train number 12951 at an average speed of 89 km / h ( including halts ) while on its return journey as train number 12952 takes 15 hrs 50 mins at an average speed of 88 km / h ( including halts ) thus making it the fastest train on the Mumbai - Delhi sector .