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Answer :
We have:
P = ₹ 26,400
R = 15% p.a. compounded yearly
n = 2 years and 4 months
So, amount for 2 years=\(P(1+\frac{R}{100})^n\)
=\(26,400(1+\frac{15}{100})^2\)
=\(26,400(\frac{23}{20})^2\)
=\(26,400\times\frac{23}{20}\times\frac{23}{20}\)
=\(66\times529=₹\; 34,914\)
Principal for 2 years=₹ 34,914
So, SI for 4 months =\(\frac{P\times R\times n}{100\times 12}\)
=\(\frac{34,914\times 15 \times 4}{100\times 12}\)
=\(₹ 1745.70 \)
Thus, the mount after 2 years and 4 months = ₹ 34,914 + ₹ 1745.70 = ₹ 36,659.70
Hence, the total amount to be paid by Kamla = ₹ 36,659.70