alleryA আৰু B-ৰ কাৰ্যক্ষমতাৰ অনুপাত 4:5 আৰু একেলগে তেওঁলোকক 20 days প্ৰয়োজন। A-ক অকলে প্ৰয়োজন
A40 days
B36 days
C50 days
D45 days
Answer & Solution
Correct answer: D. 45 days
মুঠ কাম হ'ল 9 units x 20 days = 180 units, আৰু A-য়ে দৈনিক 4 units কৰে, গতিকে 45 days।
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