The present age of three persons are in the proportion of 4 : 7 : 9. Eight years ago, the sum of their ages was 56 years. The present age of the eldest person is -
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
1 (36)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
Let, present ages of three persons 4x, 7x, 9x
Eight years ago, the sum of their ages was 56 years
At present, the sum of their ages i s
= 56 + 8 + 8 + 8 = 56 + 24 years = 80 years
4x + 7x + 9x = 80
⇒ 20x = 80
⇒ x = 4
The present age of the eldest person is = 4 × 9 = 36 years
