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Q: The difference between the ages of two persons is 10 years. Fifteen years ago, the elder one was twice as old as the younger one. The present age of the elder person is:

  • 1
    30 years
  • 2
    35 years
  • 3
    40 years
  • 4
    45 years
  • Show Answer
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Answer : 2. "35 years"
Explanation :

Let their ages be x years and (x+10) years respectively. Then, (x+10)-15=2(x-15)⇔x-5=2x-30⇔x=25

so that present age of elder person=(x+10)=35 years

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