300 grams of sugar solution has 40% sugar in it. How much sugar should be added to make it 50% in the solution?
A
40 grams
B
60 grams
C
80 grams
D
90 grams
Correct Answer: 60 grams
ধরি, x গ্রাম চিনি যোগ করতে হবে। ( 300 এর 40%) + x = ( 300 + x) এর 50% 300 ×( 400/100) + x = 300 + x × (50/100) 120 + x = 300 + x /2 2x + 240 = 300 + x 2x - x = 300 - 240 x = 60