উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
Tk. 18,500
Let the Salary of an officer = x in 1999
In 2000, his salary increased by 20%
His salary is 120% of x = y let say
In 2001, Salary = Tk. 26640
His salary increased by 20% from previous year salary
Now his salary is 120% of y.
Substituting value of y, we get
⇒120%of(120% of x)
⇒100120×100120×x = 26640
⇒1.44×x = 26640
⇒x = Tk. 1.4426640 = Tk. 18,500