a CD player was sold at a profit of 10%. had it been sold for rupees 25 more,then profit would have been 12%. find the CP of the CD player .
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let cp = x rs
sp = 110% of x
or sp = 11x/10 rs
when sp will be (11x/10)+25 rs
then profit 12%
so (11x/10)+25=112%of x
or 11x/10+25=112x/100
or 112x/100-110x/100=25
or 2x/100=25
or x=1250
sp = 110% of x
or sp = 11x/10 rs
when sp will be (11x/10)+25 rs
then profit 12%
so (11x/10)+25=112%of x
or 11x/10+25=112x/100
or 112x/100-110x/100=25
or 2x/100=25
or x=1250
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