profit and loss

Question

5 kg of flour at $6 per kg  is mixed with 4 kg of flour to get a mixture costing $7 per kg . Find the price of the costlier flour.

 

(a)$8

(b)$7.75
(c)$6.75

(d)$7.25

(e)$8.25

Answer 1

cheaper flour costs $6 and expensive costs x:

(5)(6) + 4x = (9)(7)

30+4x =63

4x=63-30=33

x=33/4

x=$8.25