alleryA একটি কাজ 16 দিনে করে, B 8 দিনে করে। A একা 4 দিন কাজ করে, তারপর B যোগ দেয়। শুরু থেকে মোট সময় হল
A7 দিন
B6 দিন
C9 দিন
D8 দিন
Answer & Solution
Correct answer: D. 8 দিন
A একা 1/4 অংশ কাজ করে; বাকি 3/4 অংশ প্রতিদিন 3/16 অংশ হারে শেষ হতে 4 দিন লাগে, সুতরাং মোট 8 দিন।
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