Multiple choice

In what ratio water must be mixed with the milk in order to obtains a mixture whose cost is Rs. 25 per liter. if the cost price of pure milk is Rs. 35 per liter? शुद्ध दूध के साथ पानी की कितनी मात्रा मिलाना होगा कि मिश्रण का मूल्य 25रू. प्रति ली. जो जाए। यदि शुद्ध दूध का क्रयमूल्य 35रू. प्रति ली. है।

  1. 5 : 7

  2. 7 : 8

  3. 3 : 4

  4. 5 : 2
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Using alligation: Milk costs Rs. 35/L, water costs Rs. 0/L, mixture should cost Rs. 25/L. Ratio of water to milk = (35-25):(25-0) = 10:25 = 2:5. So water:milk = 2:5, giving water:milk ratio as 2:5.

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