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1. Today is Arif's 12 th birthday and his father's 40 th birthday. how many years from today will Arif's father be twice as old as Arif at that time?
- A. 18
- B. 18
- C. 18
- D. 18
Answer: Option C
Explanation:
ধরি, x বছর পর রাতুলের বাবার বয়সের দ্বিগুন হবে।
40 + x = 2 ( 12 + x)
40 + x = 24 + 2x
2x - x = 40 - 24
c = 16
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