Question

You need a 18% acid solution for a certain test, but your supplier only ships a 13% solution and a 43% solution. You need 120 lts of the 18% acid solution. The 13% solution costs rs 82 per ltr for the first 67 ltrs, and rs 66 per ltr for any amount in access of 67 ltrs. What is the cost of the 13% solution you should buy?



a. 8002 b. 7012



c. 7672 d. 7342

Answer 1

Answer:

Step-by-step explanation:

0.13x + 0.43y = 0.18 * 120 & x + y =120 => y = 120 - x

=> 0.13x + 0.43 (120 - x) = 0.18 * 120

=> x = 100

=> 100 lts of 13% solution

100 - 67 = 33

So,

67 * 82 + 33 * 66 = 7672

Therefore, Answer is Rs. 7672 for 100 lts of 13% solution.