৩০ বছর পর জেকভ তার বর্তমান বয়সের চারগুণ হবে । তার বর্তমান বয়স বের কর:
A. 10
B. 11
C. 7.5
D. 30
সঠিক উত্তরঃ
A.
10
Explanation:
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