Interest on drawings is calculated as:
\[
\text{Interest on Drawings} = \text{Total Drawings} \times \text{Rate of Interest} \times \text{Average Period}.
\]
1. Total Drawings = ₹ 10,000 \times 4 = ₹ 40,000.
2. Average Period = \(\frac{15}{12}\) years (as withdrawals are made at the beginning of each quarter).
3. Interest on Drawings:
\[
\text{Interest} = ₹ 40,000 \times \frac{6}{100} \times \frac{15}{12} = ₹ 1,500.
\]