The ratio of the ages of A and B is 4 : 5. If the sum of their ages is 81 years, find the age of B after 5 years. A और B की आयु का अनुपात 4 : 5 है। यदि उनकी आयु का योग 81 वर्ष है, तो 5 वर्ष बाद B की आयु ज्ञात कीजिए।
A
45 years (45 वर्ष)
B
50 years (50 वर्ष)
C
36 years (36 वर्ष)
D
41 years (41 वर्ष)
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Correct Answer 50 years
Explanation
Total parts = 4 + 5 = 9. 9 parts = 81 years -> 1 part = 9 years. B's present age = 5 * 9 = 45 years. B's age after 5 years = 45 + 5 = 50 years.