alleryA-য়ে অকলে কাম কৰা B-তকৈ 6 দিন কম সময় লয়, আৰু একেলগে তেওঁলোকে 4 দিনত শেষ কৰে। B-য়ে অকলে লয়
A8 দিন
B9 দিন
C12 দিন
D10 দিন
Answer & Solution
Correct answer: C. 12 দিন
A = x আৰু B = x + 6 হ'লে, 1/x + 1/(x+6) = 1/4-এ x = 6 দিয়ে, গতিকে B-য়ে 12 days সময় লয়।
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