The present age of three persons are in the proportion of 4 : 7 : 9. Eight years ago, the sum of their ages was 56 years. The present age of the eldest person is -

A 28

B 36

C 45

D None of these

Solution

Correct Answer: Option B

মনে করি,
লোক তিন জনের বর্তমান বয়স যথাক্রমে 4x,7x ও 9x
প্রশ্নমতে,
⇒ (4x-8) + (7x-8) + (9x 8) = 56
⇒ 4x -8 + 7x - 8 + 9x - 8 = 56
⇒ 20x - 24 = 56
⇒ 20x=80
⇒ x = 4
∴ বয়োজ্যেষ্ঠ ব্যক্তির বয়স = 9 x 4 = 36 বছর

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