alleryA-এর 10 দিন এবং B-এর 15 দিন সময় লাগে। A প্রথমে শুরু করে একদিন অন্তর কাজ করলে, তারা কাজটি সম্পন্ন করবে
A12 দিন
B11 দিন
C10 দিন
D15 দিন
Answer & Solution
Correct answer: A. 12 দিন
প্রতি দুই দিনের চক্রে কাজ হয় 1/10 + 1/15 = 1/6 অংশ, তাই 6টি চক্রে 12 দিন সময় লাগে।
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