A worker has taken 15 hours to complete a job. It has enabled him to get bonus under both Halsey and Rowan Schemes. Since the worker is not much educated, he requested a cost accountant for necessary advice. The advisor informed him that Rowan method is better for him since it will give him extra bonus of 6.25 in comparison with the Halsey method. Hourly wage rate is 5. You are requested to ascertain standard time allowed for the job