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Question

By selling a watch for Rs.720, Ravi loses 10%. At what price should he sell it, in order to gain 15%?

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Solution

It is given that,
S.P of watch = 720 Rs
Loss = 10%
Therefore,
C.P =100100losspercentage×S.P.
=100(10010)×720
=10090×720
=800
C.P of watch is Rs. 800.
It is given in the problem that, Profit expected = 15%
C.P =100100+profit percentage×S.P.
=100100+15×S.P.

800=100115×S.P.

S.P.=800×115100
=92000100=920
Thus, the selling price will be 920 to get a profit of 15%

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