a milkman purchase certain litres of milk at rate of 45 per litre and certain litres of milk at 51 per litre.selling all the milk for rs 1200 he made a profit of 150 rs.if he had purchased 22 liters of milk find the Quantities of milk purchased at each rate .
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total sp = 1200
cp = 1200-150
= 1050
let the quantity purchased at rs 45/l be x
then quantity purchased at rs 51/l = 22-x
45x + 51(22-x) = 1050
45x - 51x + 1122= 1050
-6x= -72
x = 12
hence quantities are 12 and 10 litres
cp = 1200-150
= 1050
let the quantity purchased at rs 45/l be x
then quantity purchased at rs 51/l = 22-x
45x + 51(22-x) = 1050
45x - 51x + 1122= 1050
-6x= -72
x = 12
hence quantities are 12 and 10 litres
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