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The compound interest of 20000 at …

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The compound interest of 20000 at 10percent compounded annually in certain period of time is rupees 4200 find the time

Posted by Archit Rai 8 years ago

CBSE > Class 08 > Mathematics

1 answers

Rajeev Malhotra 8 years ago

P = 20,000 , R= 10% , Interest = 4200 T=?

So Amount = 20,000+4200 = 24200

{tex}A= P (1+r/100)T{/tex}

24200 = 20000(1+10/100)^t

24200/20000 = (1+1/10)^t

242/200 = (11/10)^t

121/100 = (11/10)^t

(11/10)² = (11/10)^t

t = 2 years

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