After a complete washout on the second day, only 56-over play was possible today and the Railways team strengthened their position as Ghosh scored 167 and Rawat 163.
They two batsmen have so far added 294 runs for the undefeated fifth wicket.
Ghosh has faced 354 balls and helped himself with 21 fours and one six while Rawat scored more briskly as his 163 came off 222 balls with 25 boundaries including two sixes.
Hosts Uttar Pradesh had to endure yet another frustrating day after being smashed by the Railways batsmen on the opening day.
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Brief Scores:
Railways 1st innings: 460 for 4 in 145 overs.(Arindam Ghosh 167 batting, Mahesh Rawat 163 batting).