A man bought a chair and sold it at a gain of 5%. If he had bought it at 5% less and sold it for Rs 45 more, he would have gained 20% . Find the cost price of the chair?
A
Rs. 400
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B
Rs. 500
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C
Rs. 450
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D
Rs. 550
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Solution
The correct option is B Rs. 500 Let CP = x SP=x+5%ofx=x+5x100=105x100=1.05x Now, If he had bought it in 5% less, CP=x−5%ofx=x−5x100=95x100=0.95x New SP=1.05x+45 New gain=20%of0.95x