Question
The ratio of the present ages of A and B is 3:4. After 5 years, the ratio becomes 4:5. What is A's present age? / A और B की वर्तमान आयु का अनुपात 3:4 है। 5 वर्ष बाद अनुपात 4:5 हो जाता है। A की वर्तमान आयु क्या है?
Option 2 : 15 years / 15 वर्ष
Detailed Solution
सही उत्तर 15 years / 15 वर्ष है।
Let the ages be 3x and 4x. Then (3x + 5)/(4x + 5) = 4/5 gives 15x + 25 = 16x + 20, so x = 5 and A's age = 15 years. / मान लीजिए आयु 3x और 4x है। तब (3x + 5)/(4x + 5) = 4/5 से 15x + 25 = 16x + 20 मिलता है, इसलिए x = 5 और A की आयु = 15 वर्ष है।
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prepsnap.in • Numerical AbilityQuestion:
The ratio of the present ages of A and B is 3:4. After 5 years, the ratio becomes 4:5. What is A's present age? / A और B की वर्तमान आयु का अनुपात 3:4 है। 5 वर्ष बाद अनुपात 4:5 हो जाता है। A की वर्तमान आयु क्या है?
Correct Answer: 15 years / 15 वर्ष
Let the ages be 3x and 4x. Then (3x + 5)/(4x + 5) = 4/5 gives 15x + 25 = 16x + 20, so x = 5 and A's age = 15 years. / मान लीजिए आयु 3x और 4x है। तब (3x + 5)/(4x + 5) = 4/5 से 15x + 25 = 16x + 20 मिलता है, इसलिए x = 5 और A की आयु = 15 वर्ष है।