How many kg of salt at 42 paise per kg must a man mix with 25 kg of salt at 24 paise per kg so that he may, on selling the mixture at 40 paise per kg gain 25% on the outlay? Choose the correct choice from the following options
A) 15 kg
B) 18 kg
C) 20 kg
D) 24 kg
E) None of these
Here, cost price of mixture = 100×100/100+25 = 32 paise   ∴q1q2=32−24/42−32=810=45   and hence q1 = 4⁄5 × 25 = 20 kg   Answer 20 kg
<result>C</result>
How many kg of salt at 42 paise per kg must a man mix with 25 kg of salt at 24 paise per kg so that he may, on selling the mixture at 40 paise per kg gain 25% on the outlay?