A shopkeeper sells sugar for Rs 25 per kg and makes a profit of 20%. If he sells the sugar for Rs 22.50 per Kg find his profit ?

• ans=12.5
  given s.p=25 per kg and profit is 20%
  from this we can find c.p
  c.p=(100/100+20)*25=20
  c.p=20
  now we have s.p and c.p from which we can find profit
  s.p=100+gain%/100*c.p
  22.50=100+x/5*20
  x=12.5
  gain%=12.5
  gain=2.50
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