Question

Please answer this question with step by step explanation.

Answer 1

=> Original Concentration of water = 2/7

=> Required Concentration of water = 4/11

=> Concentration of water adder = 1/1 = 1

Using concept of alligations :-

Mixture ----------- Water

2/7 ------------- 1

- - - 4/11 - - -

7/11 ----------- 6/77

=> The required ratio = 7/11 : 6/77

=> 49 : 6

=> 6 litres have to be added

Option (2) is correct answer

I hope this will help you dear..

Always stay safe and stay healthy..

Answer 2

Answer:

option no. 2)6

Step-by-step explanation:

please mark it brainliest and thank it please