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Question

You want to sell a books for Rs. 96 and gains as much percent as the cost price of the book. Find the gain % of the book.

A
12
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B
241
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C
36
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D
48
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Solution

The correct option is D 36
Let the C.P. of the book be x
Gain %=x% of x= x2100
S.P. = C.P. + gain
S.P. =96
Therefore, x+x2100=96
100x+x2=9600
x2+100x9600=0
(x+160)(x60)=0
x=160 or 60
Price cannot be negative.
Gain %=x% of x
= 60100×60
=36

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