a shopkeeper bought 80 kg of sugar at the rate of rs.13.5 per kg. he mixed it with 120 kg of sugar costing rs.16 per kg .in order to make a profit of 20% he must sell the mixture at
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total price of goods purchased
ie cost price is = (80*13.5)+(120*16) = 3000.
He needs 20% profit on this cost price so that we need to find out 20% of 3000
= 3000*20/100 = 600(profit)
selling price = COST PRICE + PROFIT
= 3000+600=3600
for one KG of mixture = 3600/200 = Rs.18
ie cost price is = (80*13.5)+(120*16) = 3000.
He needs 20% profit on this cost price so that we need to find out 20% of 3000
= 3000*20/100 = 600(profit)
selling price = COST PRICE + PROFIT
= 3000+600=3600
for one KG of mixture = 3600/200 = Rs.18
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