Subject
Quantitative Aptitude
Topic
Interest
In what time will Tk.4200 amount to Tk.88 at 16% compound interest payable half-yearly?
In what time will Tk.4200 amount to Tk.88 at 16% compound interest payable half-yearly?
ক)
1 Yearখ)
2 yearsগ)
1.5 yearsঘ)
2.5 yearsExplanation
For CI payable at half-yearly, the Amount = P ( 1+ r/2/100)2n i.e. 4200 ( 1+ 16/2/100)2n = 4898.88 i.e. 4200 (1 + 8/100) 2n = 4898.88 4200( 1+ 2/25)2n = 4898.88 i.e. (27/25)2n = 4898.88/4200 = 489888/420000 = 729/625 = (27/25)2×1 i.e. (27/25)2n = (27/25)2×1 therefore the time ‘n’ = 1 year.Related questions
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