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A merchant purchases a wrist watch for `Rs 450` and fixes its list price in such a way that after allowing a discount of `10%`, he earns a profit of `20%`. Then the list price of the watch is |
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Answer» Let the list price of the wrist watch is `x` rupees. As, the merchant had given a discount of `10%` to the list price, `:.` Selling price ` = x**(100-10)/100 = 0.9x` Rs Now, Cost price of the wrist watch `= 450` Rs Profit ` = 20%` `:. 450**(100+20)/100 = 0.9x` `=>450**120/100 = 0.9x` `=>540 = 0.9x` `=> x = 540*10/9 = 600` So, the list price of the watch is `600` Rs. |
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