1 year ago the ratio between A's and B' s salary was 3 : 4. Ratios of their individual salaries between last year's and this year's salaries are 4 : 5 & 2 : 3 respectively. At present the total of their salary is TK. 4160. How much is the salary of A now?
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
2 (TK. 1600)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
Let,
the salaries of A and B last year be Tk. 3x and Tk. 4x respectively.
Then,
A's present salary = Tk. (5/4) × 3x
= Tk. 15x/4
B's present salary = Tk.(3/2) × 4x
= Tk. 6x.
According to the question,
(15x/4) + 6x = 4160
⇒ 15x + 24x = 4160 × 4
⇒ 39x = 4160 × 4
⇒ x = (4160 × 4)/39
So, A's present salary = Tk. (15/4) × {(4160 × 4)/39}
= Tk.1600
