allery40% গাঢ়ত্বের একটি দ্রবণে 28 L গাঢ় উপাদান রয়েছে। এর মোট আয়তন কত?
A60 L
B65 L
C70 L
D75 L
Answer & Solution
Correct answer: C. 70 L
যদি 28 L হয় 40%, তবে সম্পূর্ণ পরিমাণ হলো 28-কে 0.4 দিয়ে ভাগ, অর্থাৎ 70 L।
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