On 1-1-2012 X and co. purchased a machine for Rs.20000 and estimated its life for 5 years. On 1-4-2013 another machine is purchased for Rs.30000 and estimated its life is also 5 years.On 31-12-2014 the first machine become obsolute and sold for Rs.6000.they close the books on 31st december every year. prepare machinery account for the year ended 31st december,2015 assuming the depreciation was charged on fixed installment method. 

pls explain the answer briefly. actually this problem is  found in the subject of financial accounting. pls tell me the answer quickly.