Question

A 50-litre solution is 3 percent salt by volume.

How many litres of water must be removed from the solution to produce a solution that is 5 percent salt by volume?



A. 2 litres

B. 4 litres

C. 6 litres

D. 10 litres

E. 20 litres

Answer 1

E

Explanation:

.03(50) + 0x = (50-x).05 How much 3% salt much be added to zero percent salt to create a mixture that is 5 percent salt.

3(50) = (50 - x)5 I multiplied through by 100 to clear the decimals

150 = 250 - 5x Distribute the 5

-100 = -5x Subtract 100 from both sides of the equation

20 = x divide both sides by -5