How much coffee of variety A, costing Rs. 5 a kg
should be added to 20 kg of Type B coffee at Rs.
12 a kg so that the cost of the two coffee variety
mixture be worth Rs. 7 a kg?
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Step-by-step explanation:
5 a kg should be added to 20 kg of coffee at Rs. 12 a kg so that the mixture be worth Rs. 7.50 a kg.? = 12 – 7.5 : 7.5 – 5 = 4.5 : 2.5 ⇒ 9 : 5.
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