allery72 के नियम के अनुसार, 18% ब्याज दर पर धनराशि को दोगुना होने में कितना समय लगेगा?
A4 वर्ष
B5 वर्ष
C3 वर्ष
D6 वर्ष
Answer & Solution
Correct answer: A. 4 वर्ष
72 / 18 = 4 वर्ष।
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