If a principal P becomes Q in 2 years when interest R% is compounded half-yearly. And if the same principal P becomes Q in 2 years when interest S% is compound annually, then which of the following is true.

A R > S

B R = S

C R < S

D None

Solution

Correct Answer: Option C

আমরা জানি ,
চক্রবৃদ্ধি সুদাসল ,C=P(1+r/100)n
আবার,ষাণ্মাসিক চক্রবৃদ্ধির ক্ষেত্রে ,
C=P(1+r/100× 2)n×2

১ম ক্ষেত্রে , Q =P(1+r/100× 2)2×2
বা, Q=P(1+r/100× 2)4.........i
২য় ক্ষেত্রে ,Q =P(1+S/100)2.............ii

i ও ii
 P(1+r/100× 2)4=P(1+S/100)2
বা, (1+R/100× 2)2=1+S/100
R<S

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