Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time ?

Answer : D. 3 years…

Rs.8000 become Rs.9261 in a certain interval of time at the rate of 5% per annum of C.I. Find the time ?

A. 4 years

B. 6 years

C. 2 years

D. 3 years

Answer : D. 3 years…

Explanation :

Amount = 9261 p = 8000
rate = 5%
A = p [ 1 + r / 100]n
9261 = 8000[1 + 5/100]n
=> 9261 / 8000 = [21 / 20]n
=> [21 / 20]3=[21 / 20]n
on comparing n = 3 so it will take 3years

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