75 gm of sugar solution has 30% sugar in it. Then the quantity of sugar that should be added to the solution to make the quantity of the sugar 70% in the solution is :
A. 125 gm
B. 100 gm
C. 120 gm
D. 130 gm
Answer: Option B
Solution(By Examveda Team)
Sugar in original solution = $$\frac{{75 \times 30}}{{100}}$$ = 22.5 gmLet m gm of sugar be mixed.
$$\therefore \frac{{22.5 + {\text{m}}}}{{75 + {\text{m}}}} \times 100 = 70$$
⇒ 2250+ 100m = 75 × 70 + 70m
⇒ 2250 + 100m = 5250 + 70m
⇒ 30m = 5250 - 2250 = 3000
⇒ m = $$\frac{{3000}}{{30}}$$ = 100 gm
Related Questions on Percentage
A. $$\frac{1}{4}$$
B. $$\frac{1}{3}$$
C. $$\frac{1}{2}$$
D. $$\frac{2}{3}$$
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