Given data:
Principal = Rs. 100
Rate of Interest = 5% per annum
Time = 20 years
Solution:
⇒ Hence, r = 5/100 = 0.05.
⇒ So, A = 100(1 + 0.05/1)^(1×20).
⇒ This yields A = 100(1 + 0.05)^20 = 100(1.05)^20.
⇒ This comes out to A =~ Rs. 265.33.
Therefore, Rs. 100 will become approximately Rs. 265.33 after 20 years at 5% per annum compound interest.
Hence, the correct answer is approximately 265.50.