RRB NTPC CBT-1 practice question
The present ages of a mother and daughter add up to 70 years. The mother is 14 years older than the daughter. What is the mother's present age?
From a RRB NTPC CBT-1 Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 42 years
Let daughter's age = x, mother's = x+14. Sum: x+(x+14) = 70 => 2x = 56 => x = 28. Mother's age = 28+14 = 42 years.
हिंदी में प्रश्न
एक माँ और बेटी की वर्तमान आयु का योग 70 वर्ष है। माँ बेटी से 14 वर्ष बड़ी है। माँ की वर्तमान आयु कितनी है?
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सही उत्तर: (B) 42 वर्ष
मान लीजिए बेटी की आयु = x, माँ की = x+14। योग: x+(x+14) = 70 => 2x = 56 => x = 28। माँ की आयु = 28+14 = 42 वर्ष।
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