Question

Nathu, The milkman, has 35 litres of milk adulterated to the extent of 10%. How
many litres of the mixture should be replaced by pure milk so that the purity
increases to 98%?​

Answer 1

Answer:

3.5 X 98 =343 hope it's correct

Answer 2

Given:

Total amount of milk = 35 litres

Extent of adulteration = 10%

To find:

How  many litres of the mixture should be replaced by pure milk so that the purity  increases to 98%?​

Solution:

Amount of adulterated mixture added initially = 10% = 10/100 * 35 = 3.5 litres

When the purity increases to 98%, amount of adulterated mixture = 2%

= 2/100 = 35 = 0.7 litres

Therefore to increase the purity of mil to 98%, amount of adulterated mixture that should be replaced by pure milk = 3.5 - 0.7 litres = 2.8 litres

Therefore the amount of pure milk required will be 2.8 litres.