Question

Santana has 600 ml of thick buttermilk she has to add 200ml water to it and some ice cube so as to make a little of buttermilk how many ice cube should she add if each ice cube contains 10ml of water

Answer 1

I think the question contains an error. She needs to make a "litre" of buttermilk.
She has 600 ml of buttermilk and has has added 200 ml to it.
=> total buttermilk = 800ml. So, she still needs 200ml to make it a litre.
each ice cube is 10ml.
200 ml means 20 ice cubes.
So, she has to add 20 ice cubes to the buttermilk.