alleryসৰল সুদত, এটা ধন 8 বছৰত দুগুণ হয়। বাৰ্ষিক হাৰ হ'ল:
A8%
B12.5%
C10%
D15%
Answer & Solution
Correct answer: B. 12.5%
1. দুগুণ হোৱাৰ অৰ্থ হ'ল উপাৰ্জিত সুদ প্ৰকৃত মূলধনৰ সমান।
2. মূলধন 100 বুলি ধৰক, গতিকে 8 বছৰত সুদেও 100 হ'ব লাগিব।
3. সৰল সুদে 100 x R x 8 / 100 = 100 দিয়ে।
4. গতিকে 8R = 100, যিয়ে R = 12.5 দিয়ে।
5. হাৰ হ'ল বাৰ্ষিক 12.5 শতাংশ। লক্ষ্য কৰক যে ই কেৱল সৰল সুদৰ ক্ষেত্ৰতহে প্ৰযোজ্য; চক্ৰবৃদ্ধিৰ অধীনত ধন সোনকালে দুগুণ হ'ব।
_Source: syllabus Maths, Ch 7 'Comparing Quantities', S7.4 Compound Interest_
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