A cloth –merchant disposed of 120 m of shop-soiled curtain material for Rs. 900 and thus suffered a loss of 37.5%.Find the cost price of the material per metre.

• Rs. 12
  
  SP/m of 120 m material = 900/120 =Rs. 7.5
  On selling at Rs. 7.5/metre there is a loss of 37.5%, so CP/m=7.5*100/(100-37.5)=750/62.5=12 Rs.
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