Multiple choice

A's age is twice the B's age.If 10 years ago, A's age was four times the B's age.What is A's present age? A की आयु B की आयु की दोगुनी है। यदि 10 वर्ष पूर्व, A की आयु B की आयु की चार गुना थी तो A की वर्तमान आयु क्या है?

  1. 36 years

  2. 38 years

  3. 32 years

  4. 39 years

  5. 30 years
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Let B's present age be x. Then A's present age is 2x. Ten years ago, A's age was 2x-10 and B's age was x-10. Given that 10 years ago A was four times B's age: 2x-10 = 4(x-10). Solving: 2x-10 = 4x-40, which gives 2x = 30, so x = 15. Therefore A's present age = 2×15 = 30 years.

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