Ram, Sham and Harnam built a room. Ram worked at it for 5 days, Sham for 7 days and Harnam for 9 days. Their daily wages in the ratio of 4 : 3 : 2 and their total wage amount to Rs.1180. What was the daily wage of Harnam?
1. Rs.80
2. Rs.40
3. Rs.60
4. Rs.90