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?
উত্তর: গ) TK. 1600
- ক) TK. 1040
- খ) TK. 2560
- গ) TK. 1600
- ঘ) TK. 3120
- ঙ) None of these
ব্যাখ্যা
C) Tk 1,600. Let last year's salaries be 3k and 4k. A's went up in the ratio 4:5, so A now earns 3k × 5/4 = 15k/4. B's went up 2:3, so B now earns 4k × 3/2 = 6k. Together 15k/4 + 6k = 39k/4 = 4160, giving k = 1280/3. So A earns 15/4 × 1280/3 = 1600 and B earns 2560.
যে পরীক্ষায় এসেছে: SGFL ২০১৭
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