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Question

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=x5%ofx=x5x100=95x100=0.95x
New SP=1.05x+45
New gain=20%of0.95x
S.PC.P=gain
1.05+450.95x=20100×0.95x
0.1x+45=0.19x
0.09x=45
x=500
CP = Rs. 500

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