allery72-ৰ নিয়ম অনুসৰি, 18% সুতত দুগুণ হ'বলৈ কিমান সময় লাগে?
A4 বছৰ
B5 বছৰ
C3 বছৰ
D6 বছৰ
Answer & Solution
Correct answer: A. 4 বছৰ
72 / 18 = 4 years।
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