Join ExamsbookAnswer : 3. "39 years"
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:5
Q: 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:
- 120 yearsfalse
- 219 yearsfalse
- 339 yearstrue
- 429 yearsfalse
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Answer : 3. "39 years"
Explanation :
Let's B's present Age=x years. Then, A's present age=(x+9) years.
so (x+9) +10=2(x-10) ⇔x=39.