allery15 জন শ্ৰমিকৰ এটা দলে 30 দিনত এটা কাম শেষ কৰিব পাৰে। 10 দিনৰ পিছত, আৰু 5 জন শ্ৰমিক যোগ দিয়ে। বাকী থকা কামখিনিয়ে সময় ল'ব
A18 দিন
B15 দিন
C12 দিন
D10 দিন
Answer & Solution
Correct answer: B. 15 দিন
বাকী থকা কাম হ'ল 15 x 20 = 300 worker-days, আৰু 20 জন শ্ৰমিকে ইয়াক 15 days-ত শেষ কৰে।
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