Question
Rahul bought 25 notebooks for Rs. 200 and he sold them
in such a manner so that selling price of 10 notebooks is Rs. 100. Find the value of 5(P + 5) if the profit percent earned by Rahul is 'P%'.Solution
ATQ, Cost price of 1 notebook = 200/25 = Rs. 8 Selling price of 1 notebook = 100/10 = Rs. 10 Profit earned = 10 − 8 = Rs. 2 So, 'P' = (2/8) × 100 = 25% P = 25 Required value = 5×(25+5) = 5×30 = 150
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