উত্তর সিলেক্ট করলে সঠিক ও ভুল দেখাবে।
ব্যাখ্যা ও সঠিক সমাধান
উত্তর:
Tk.200
Hints: Let cost price of an article x
When SP is 340 Tk, then gain % = 340 - x /x ×100
When SP is increased, if 5% more is gained by selling an article for 350 TK. than by selling if for 340 TK.
Then, [ (350 - x)/x ×100] - [ (340 - x)/x × 100 ] = 5
100/x [ 350 - x - 340 + x ] = 5
100/x [10] = 5
x = 1000/5 = 200 TK.