Subject
Bank Exam
Topic
Bangladesh Bank AD 2011
By selling a book for Tk.560, gain is as much percent as it costs in tk. The cost price is:
By selling a book for Tk.560, gain is as much percent as it costs in tk. The cost price is:
ক)
Tk. 191.87 (approximately)খ)
Tk. 40গ)
Tk. 360ঘ)
Tk. 140Explanation
Let, CP = x so at x% gain, the SP = 100+x taka now, the CP = 560 - (100+x) = 660 - x But, from the top, we know that, 660 - x = x or, 660 = 2x or, 660/2 = x or, x = 330 takaRelated questions
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