Question
58 notebooks have been purchased at the rate of 1 Rs.
How many notebooks should be sold at the rate of Rs 1 to earn 45% profit?Solution
CP of 1 notebook = 1/58 Rs. SP of 1 notebook = 1/58 * 145% = 145/5800 Rs. Hence number of notebook must ne sold in 1 Rs. = 1/ (145/5800) = 5800 /145 = 40 Alternate Solution: Reuired result = Number of articles bought × 100/(100+Profit)  = 58×a (100/145) = 40
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