The cost of an article was Tk.75. The cost was first increased by 20% and later on it was reduced by 20%. The present cost of the article is?
বিকল্পসমূহ (নিজের উত্তর যাচাই করতে ক্লিক করুন):
সঠিক উত্তর
2 (Tk. 72)
বিস্তারিত ব্যাখ্যা ও বিশ্লেষণ:
Solution:
Initial Cost = Tk. 75
After 20% increase in the cost, it becomes,
= (75 + 20% of 75)
= 75 + (20 ×75)/100
= 75 + 15
= 90
Now, Cost is decreased by 20%, So cost will become,
(90 - 20% of 90)
= 90 - (20 × 90)/100
= 90 - 18
= 72
So, present cost is Tk. 72
