After dismissing RoI for 330, Vidarbha started the proceedings on a positive note, forging a 50-run stand. Skipper Faiz Fazal (27) and Sanjay Raghunath (65) played sensibly before the skipper departed.
The middle-order also rose to the occasion as Ganesh Satish (48) and Wadkar contributed handsomely.
But lack of support from other batters - Atharwa Taide (15), Mohit Kale (1) and Aditya Sarwate (18) - costed Vidarbha.
For RoI, Krishnappa Gowtham, Dharmendrasinh Jadeja scalped two wickets each while Ankit Rajpoot and Rahul Chahar chipped in with one wicket each.
Brief scores: RoI: 330/10 against Vidarbha 245/6 (Sanjay Raghunath 65, Akshay Wadkar 50 not out; Krishnappa Gowtham 2/33) at stumps on Day 2.