Question

in what ratio should a vendor mix water with milk to gain 6 1/2% on selling the mixture at cost price​

Answer 1

Answer:

Detailed Solution

We want to sell the mixture at cost price and still gain 25%. ∴ The required answer is 1 : 4.

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Answer 2

Given,

Gain After Mixing Water and selling at Cost Price is giving a profit of 6.5%.

To Find,

The ratio for mixing water

Solution,

Let's say the Cost price =  Rs.$x$ per liter

Total Liters of Milk = $y$

Let's say he mixes $z$ liters of water

Thus total milk = $y+z$

Total income from selling = $x(y+z)$

since gain is 6.5%

$z=6.5y/100$

Required ratio is $z:y$

Henceforth the answer is $0.065:1$