allery72-এর নিয়ম অনুসারে, 12% সুদে অর্থ প্রায় কত বছরে দ্বিগুণ হয়?
A8 বছর
B12 বছর
C5 বছর
D6 বছর
Answer & Solution
Correct answer: D. 6 বছর
72-কে 12 দিয়ে ভাগ করলে 6 পাওয়া যায়।
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