Problem: Every year Mr. Kalain saves Tk. 5,400 which is 15% of his annual income. Mr. Rahim spends Tk. 2,800 a month which is 87.5% of his monthly income. Who has more income?
View all: IFIC BANK LTD | PROBATIONARY OFFICER | WRITTEN QUESTION SOLVE(MATH) | 2002
Correct Answer: Rahim has more income Tk. 38,400 than Kalam Tk. 36,000.
Explanation:
At 15% of annual income, Kalam saves Tk 15 when annual income = Tk. 100Kalam saves Tk. 5400 when annual income = Tk. $\frac{100×5400}{15}$
= Tk. 36000 (per year)Rahim spends Tk. 2800 per monthRahim spends Tk. 87.5 when monthly income = Tk. 100Rahim spends Tk. 2800 when monthly income = Tk. $\frac{100×2800}{87.5}$
= Tk. 3200
Rahim’s per month income = 3200Rahim’s per year income = 3200 x 12 = Tk. 38400