Subject
Bank Exam
Topic
Joint Recruitment Test for 7 Banks and Financial Institutions - (Senior Officers) - 05.11.2021
A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to 8 times itself?
A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to 8 times itself?
ক)
12 Yearsখ)
8 yearsগ)
16 yearsঘ)
64 yearsExplanation
চক্রবৃদ্ধি সুদাসল ,C=P(1+r+/100) n প্রথম ক্ষেত্রে 2P=P(1+r/100) 4 বা, 2=(1+r/100) 4 বা,2 (1/4 ) =(1+r/100) বা,(1+r/100)=2( 1/4 ) আবার, 8P=P(1+r+/100) n বা,8=(1+r+/100) n বা, 2³=(21/4 ) n বা, 2³=2 n/4 বা, 3=n/4 বা,n=12 বছর ∴ ১২ বছর পর সুদাসল ৮ গুণ হবে ।Related questions
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