alleryতিনিজন ৰংমিস্ত্ৰীয়ে অকলে ক্ৰমে 12, 15 আৰু 20 দিন সময় লয়। যদি তিনিওজনে একেলগে কাম কৰে, কামটোত সময় লাগিব
A3 দিন
B4 দিন
C5 দিন
D6 দিন
Answer & Solution
Correct answer: C. 5 দিন
দৈনিক কাম হ'ল কামটোৰ (5 + 4 + 3)/60 = 12/60 = 1/5 অংশ, গতিকে 5 days।
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