Subject
Bank Exam
Topic
Pubali Bank Ltd. Junior Officer 2014
A sum invested at 5% simple interest per annum grows to Tk. 504 in 4 years. The same amount at 10% simple interest per annum in 21/2years will grow to:
A sum invested at 5% simple interest per annum grows to Tk. 504 in 4 years. The same amount at 10% simple interest per annum in 21/2years will grow to:
ক)
Tk.420খ)
Tk.450গ)
Tk.525ঘ)
Tk.550Explanation
দেওয়া আছে, ৫% সরল সুদে ৪ বছরে আসল + সুদ = ৫০৪ টাকা। আমরা জানি, সরল সুদের সূত্র হলো: I = PRT/100 যেখানে, I = সুদ P = আসল R = সুদের হার T = সময় ধরি, আসল = P টাকা। ৪ বছরের সুদ = (P×5×4)/100 = 20P/100 = P/5 টাকা। প্রশ্নানুসারে, আসল + সুদ = ৫০৪ টাকা বা, P + P/5 = 504 বা, 6P/5 = 504 বা, 6P = 504×5 বা, 6P = 2520 বা, P = 2520/6 বা, P = 420 টাকা। সুতরাং, আসল = ৪২০ টাকা। আবার, আসল ৪২০ টাকা, সুদের হার ১০% এবং সময় ২.৫ বছর । এখন, সুদ = (P×R×T)/100 = (420×10×2.5)/100 = 21000/200 = 105 সুতরাং, সুদে আসলে হবে = আসল + সুদ = ৪২০ টাকা + ১০৫ টাকা = ৫২৫ টাকা। Related questions
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