Capital on 31st March 2018 = Total Assets – External Liabilities
= Rs. 2,00,000 – Rs. 6,000 = Rs. 1,94,000 Capital on 01st April 2017
= Capital on March 31, 2018 – Additional Capital + Drawings – Profit
= Rs. 1,94,000 – Rs. 20,000 + Rs. 12,000 – Rs. 20,000
= Rs. 1,66,000