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Three grades A,B and C of rice were mixed in the ratio 3:4:5.The cost per kg of each of the grades A,B and C were...

      

Three grades A,B and C of rice were mixed in the ratio 3:4:5.The cost per kg of each of the grades A,B and C were ksh.120,ksh.90 and ksh.60 respectively. calculate
a.the cost of 1kg of the mixture
b.the selling price of 5kg of the mixture given that the mixture was sold at 8% profit.

  

Answers


Belvine
Grades A B C total mixture
Ratio 3 : 4 : 5 12
Price/kg 120 90 6

Total/ 360 360 300 Ksh.1020
Grade

a) cost of 1kg of mixture.
The ratio 3+4+5 = 12kg.
The cost of a mixture of 12kg is Ksh.1020
1kg = 1020÷ 12 = Ksh.85 per kg.

b) selling price of 5kg of mixture with a profit of 8%.
1kg = Ksh. 85.
5kg = 85 × 5 = Ksh. 425.
They are selling at 8% profit.
Ksh. 425 is at 100%
With the profit it will be at 100% +8% (profit) = 108%
At 100% = Ksh.425
At 108% = ?
108× 425 ÷100 = Ksh. 459 for 5kg.

Lizbel answered the question on December 15, 2017 at 18:28


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