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1. If in 1997, 1998 and 1999 a worker received 10% more salary each year than he did the previous year. How much did he receive in 1999 than in 1997?/একজন শ্রমিক ১৯৯৭, ১৯৯৮ এবং ১৯৯৯ সালের প্রত্যেক বছর পূর্বতন বছরের বেতন অপেক্ষা ১০% বেশি বেতন পেল। সে ১৯৯৯ সালে ১৯৯৭ সালের চেয়ে কত বেশি বেতন পেল?
- A. 10%
- B. 10%
- C. 10%
- D. 10%
Answer: Option B
Explanation:
Say, salary in 1997 was Tk. 10
In each year, he received 10% more than the previous year
In 1997, salary = 10
In 1998, salary = 10 + 1 = Tk. 11
In 1999, salary = 11 + 11x (10/100) = 11 + 1.1 = 12.1
% Difference = (Changex100)/Origina = (12.1 - 10)x100/10 = 21%
In each year, he received 10% more than the previous year
In 1997, salary = 10
In 1998, salary = 10 + 1 = Tk. 11
In 1999, salary = 11 + 11x (10/100) = 11 + 1.1 = 12.1
% Difference = (Changex100)/Origina = (12.1 - 10)x100/10 = 21%
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