Kelly blends coffee. She mixes brand A costing $6 per kilogram with brand B costing $8 per kilogram. How many kilograms of each brand does she have to mix to amke 50 kg of coffee costing her $7.20 per kg?

- February 11th 2009, 10:25 PMTessarina[SOLVED] Mixing three brands of coffee to get a required cost/kg of the final mix
Kelly blends coffee. She mixes brand A costing $6 per kilogram with brand B costing $8 per kilogram. How many kilograms of each brand does she have to mix to amke 50 kg of coffee costing her $7.20 per kg?

- February 11th 2009, 10:35 PMADARSH
**Welcome to the Forum(Clapping)**

(Hi)

Let say she mixes xkg of coffeeA

its cost = $6x

So 50-x kg of coffee is mixed

its cost = $(50-x)8

Cost of 50 kg of coffee =50*7.2 =$360

hence

6x+(50-x)8 = 360

6x-8x= 360-400

2x=40

x= 20kg = amount of coffee A

50-x=30kg = amount of coffee B - February 12th 2009, 12:41 AMTessarina
Thanx a mill! u saved my butt!