Question

(4) how many kilogram of sugar costing rs. 9 per kg must be mixed with 27 kg of sugar costing rs. 7 per kg so that there may be a gain of 10% by selling the mixture at rs. 9.24

Answer 1

let x kg of sugar is to be added
total sugar=27+x
total cost =9x+27*7=9x+189
total money earned=9.24 (27+x)
(9x+189)*1.1=9.24 (27+x)
9.9x+207.9=249.48+9.24x
.66x=41.58
x=63kg