If the difference between CI and SI earned on a certain amount at 20 pa at the end of 3 years is Rs ...........

Quantitative Aptitude ( CCS) Compound Interest

If the difference between CI and SI earned on a certain amount at 20% pa at the end of 3 years is Rs.640, find out the principal.

Rs5500

Rs6500

Rs4500

Rs5000

SI-CI for 3 yrs =Pr²/100³*(300+r)
640=P*20²/100³*320
640=(P*20*20/100*100*100)*320
P=Rs5000

Hence, option 4 is the correct answer.

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