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By selling a transistor for Rs. 572, a shopkeeper earns a profit equivalent to 30% of the cost price of the transistor. What is the cost price of the transistor?

By selling a transistor for Rs. 572, a shopkeeper earns a profit equivalent to 30% of the cost price of the transistor. What is the cost price of the transistor? Correct Answer Rs. 440

SP of the transistor = Rs. 572

Let the CP be x

According to the question

x × 30/100 = 572 – x

⇒ 130x/100 = 572

⇒ x = 572 × 100/130

∴ CP of the transistor = Rs. 572 × 100/130 = Rs. 440

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