If a person sells a watch for Rs. 500, he loses 20% and if he sells a watch for Rs. Need to sell?
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Answer:
Selling price of watch is S.P.=Rs.1440
Cost price of watch =
100−loss%
100
×S.P
∴ Cost price of watch =
100−10
100
×1440
∴ Cost price of watch =
90
100
×1440=Rs.1600
Selling price of watch to gain 5%=1600×
100
5
+1600=80+1600=Rs.1680
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