In what ratio coffee at 285 Rs/kg should be mixed with the coffee at 320 Rs/kg so that after mixture its rate become 300 Rs/kg if the quantity of 1st type is 28 kg what will be the quantity of the 2nd coffee?
Ratio = 20:15 = 4:3 1st type coffee is 28 kg. So, 4 means 28 kg. Therefore, 2nd type coffee = 28 x (3/4) = 21 kg
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