Cost price 1500. Selling price 2000. Find the value of profit
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Let equal loss and profit=r℅.
CP(1–r℅) =SP=1500.
CP(1+r℅) =SP=2000.
CP(1–r℅) /CP(1+r℅) = 1500/2000.
2000(1–r℅) =1500(1+r℅).
2000(100–r) =1500(100+r).
3500r=200000–150000=50000.
r=50000/3500 =100/7 .
CP(1–100/700) =1500.
CP=700*1500/600 = 350*5=Rs 1750.
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