A company gives contract to build the museum for Rs. 50000 in 40 days. Company also demands compensation for delay in the work in the form of interest on contract from contractor at 10% per 4 days after 40 days. In starting, the contractor employs 100 men to work. After 28 days, 40 men left the job and remaining work is completed by remaining men so the time taken to complete the work is beyond the time. Find the interest paid by the contractor, interest is being compounded annually.