AP Police Constable practice question
The present age ratio of the mother to the daughter is 7: 2. After 12 years, their ages will be in the ratio of 9: 4. What is the current age of the mother?
From a AP Police Constable Science practice set · Science
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Correct answer: (C) 42 years
Let present ages be 7x and 2x. After 12 years, (7x+12)/(2x+12) = 9/4, which gives 28x+48 = 18x+108, so x = 6. Mother's current age = 7x6 = 42 years.
हिंदी में प्रश्न
माँ और पुत्रीी की वर्तमान आयु का अनुपात 7: 2 है। 12 वर्षों बाद उनकी आयु का अनुपात 9: 4 होगा। माँ की वर्तमान आयु कितनी है?
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सही उत्तर: (C) 42 वर्ष
मान लीजिए वर्तमान आयु 7x और 2x है। 12 वर्ष बाद, (7x+12)/(2x+12) = 9/4, जिससे 28x+48 = 18x+108, अतः x = 6। माँ की वर्तमान आयु = 7x6 = 42 वर्ष।
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