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On selling 17 balls at Tk. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is :

On selling 17 balls at Tk. 720, there is a loss equal to the cost price of 5 balls. The cost price of a ball is : Correct Answer Tk. 45

Hints: যেহেতু 5 টি বলের ক্রয়মূল্যের সমান টাকা ক্ষতি হয়েছে সেহেতু (17 - 5) বা 12 টি বলের ক্রয়মূল্য 720 টাকা 1 টি বলের ক্রয়মূল্য = 720/12 = 60 টাকা

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