Question

Find the percent of concentration when 20 gm of sugar is mixed in 60gm of water.how many more grams of sugar has to be added to make it a 40% solution?
Find the percentage of concentration 120 gram of sugar mills in 60 gram of water how many more gram sugar has to be added to make it a 40% solution

Answer 1

Percent of concentration when 20 gm of sugar is mixed in 60 gm of water is 20/(20+60) X 100=25%.

More sugar that has to be added to make it a 40% solution is 20 gm.

Answer 2

Answer: Percent of concentration is 25% and 20 gm of sugar has to be added.

Step-by-step explanation:

Since we have given that

Quantity of sugar = 20 gm

Quantity of water = 60 gm

We need to add more grams of sugar to make it a 40% solution.

We will use "Mixture and allegations":

Sugar        water

20              60

+x

-------------------------------

40      :      60

so, 20+x = 40

x= 40-20

x=20 gm

Percent of concentration would be

$\dfrac{20}{20+60}\times 100\\\\=\dfrac{20}{80}\times 100\\\\=\dfrac{1}{4}\times 100\\\\=25\%$

Hence, percent of concentration is 25% and 20 gm of sugar has to be added.