Munawar Corporation uses a predetermined overhead rate based on direct labor-hours to apply manufacturing overhead to jobs. Last year, Hanif Corporation incurred Rs. 150,000 in actual manufacturing overhead cost. The Manufacturing Overhead account showed that overhead was underapplied Rs. 30,000 for the year. If the predetermined overhead rate was Rs. 6 per direct labor-hour, how many hours did the Corporation work during the year?

plz answer this question...thanks