there is 108 ml of water in a glass and 20 ml of lemon we want to create lemon water such that 20% of the solution is lemon .how many ml of lemon would we add.
Answers
Given : 108 ml of water in a glass and 20 ml of lemon we want to create lemon water such that 20% of the solution is lemon .
To find : how many ml of lemon would we add.
Solution:
Let say x ml od lemon is added
then lemon = 20 + x ml
Water = 108 ml
Total solution = 108 + 20 + x = 128 + x ml
Lemon % is 20 % in solution
=> 100 * (20 + x) / ( 128 + x) = 20
=> => 5 * (20 + x) = 128 + x
=> 100 + 5x = 128 + x
=> 4x = 28
=> x = 7
7 ml of lemon will be added to get 20% of the solution
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