India beat Sri Lanka by 6 wickets in the third one-dayer of the tri-nation Cricket series at Dambulla on Monday night. Virendra Sehwag 99, Mahendra Singh Dhoni 23 and Suresh Raina 21 were the top scorers. With this victory, India are back in contention in the tri-series.Earlier electing to bat, the hosts were bundled out for a paltry 170 runs in 46.1 overs. Dilshan was the top scorer with 45 runs followed by Randiv 43 runs.For India, P. Ojha took 3 wickets while P. Kumar, Ashish Nehra and R. Jadeja shared 2 wickets each.