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 ---- ?

Created: 1 week ago | Updated: 1 week ago | Created By:

Imran Ahmed

19 years

29 years

39 years

49 years

0 1

Best Answer Explained in Below-:

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

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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 ---- ?

3.5 can be expressed in terms of percentage as ----

A takes 5 days more than B to do a certain job and 9 days more than C. A and B together can do the job in the same time as C. How many days A would take to do it?

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