Question

If a sum of Rs.40000 at compound interest of 5% p.a. amounted to Rs.44100,find the time for which the money was investedIf a sum of money becomes 256/81 times of itself im 4 years compounded annually, find the rate of interest.



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Answer 1

Step-by-step explanation:

I = PRN/100

4100= 40000 × 5% × n

4100 ×100/40000× 5 = n

n = 2.05

now 40000×256/81= 126400

i= prn/100

86400(126400-40000)= 40000× r× 4

86400 = 160000× r