SSC GD Constable practice question
The ages of two friends are in the ratio 5: 7. After 8 years the ratio becomes 3: 4. The present age of the younger friend is:
From a SSC GD Constable Quantitative Aptitude practice set · Quantitative Aptitude
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Correct answer: (B) 40 years
4(5x+8) = 3(7x+8) ⇒ 20x+32 = 21x+24 ⇒ x = 8. Younger = 5×8 = 40 years.
हिंदी में प्रश्न
दो दोस्तों की उम्र का अनुपात 5:7 है। 8 वर्ष बाद यह अनुपात 3:4 हो जाता है। छोटे दोस्त की वर्तमान आयु है:
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सही उत्तर: (B) 40 वर्ष
4(5x+8) = 3(7x+8) ⇒ 20x+32 = 21x+24 ⇒ x = 8. Younger = 5×8 = 40 years.
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