After how many years will ₹ 8000 becomes ₹10125 at 12 1/2% p. a compound interest .
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Principal = Rs.8000
Amount = Rs.10125
Rate = 25/2%
Time = t
A = P*(1+R/100)^T
=> 10125 = 8000(1+25/200)^T
=> 10125/8000 = (225/200)^T
=> 2025/1600 = (45/40)^T
=> 405/320 = (9/8)^T
=> 81/64 = (9/8)^T
=> (9/8)^2 = (9/8)^T
Therefore T = 2 years
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