The total amount realised from the debtors is calculated as follows:
\[
Total Debtors} = 3,00,000 - 30,000 = 2,70,000
\]
Out of the remaining debtors, ₹ 20,000 were bad, so:
\[
Remaining Debtors} = 2,70,000 - 20,000 = 2,50,000
\]
Since 90\% of the remaining debtors were realised, the total amount realised is:
\[
Amount Realised} = 2,50,000 \times 90\% = ₹ 2,25,000
\]
Including ₹ 20,000 from the bad debts, the total realised is ₹ 2,52,000.