Subject
Govt.Jobs
Topic
বিসিআইসি (সহকারী ব্যাবস্থাপকঃ প্রশাসন) - ১৩.০৫.২০২২
An acid and water solution containing 30% acid must be added to an acid and water solution containing 80% acid to create 20 liters of a solution with 45% acid concentration .How many liters of the 30% solution are needed ?
An acid and water solution containing 30% acid must be added to an acid and water solution containing 80% acid to create 20 liters of a solution with 45% acid concentration .How many liters of the 30% solution are needed ?
ক)
14খ)
12গ)
11ঘ)
10Explanation
মনে করি 30% এসিড মিশ্রিত দ্রবণের পরিমাণ =x লি. 80% " " " " =(20-x) " প্রশ্নমতে , x এর 30%+(20-x) এর 80% =20 এর 45% বা,x × 30% +(20-x) × 80% =20 × 45% বা,x ×3 +(20-x)×8=2×45 বা,3x +160-8x=90 বা,-5x=-70 বা,x=14 অতএব, 30% এসিড মিশ্রিত দ্রবণের পরিমাণ =14 লি.Related questions
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