In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is ----

In 10 years, A will be twice as old as B was 10 years ago. If A is now 9 years older than B, the present age of B is ---- Correct Answer 39 years

ধরি, এর বর্তমান বয়স x বছর ∴ A " " " (x + 9 ) " ∴ (x + 19 + 10) = 2(x - 10 ) ⇒ x + 19 = 2x - 20 ⇒ 2x - x = 20 + 19 ∴ x = 39
Bissoy MCQ

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