alleryA-এর 12 দিন এবং B-এর 24 দিন সময় লাগে। কাজ শেষ হওয়ার 3 দিন আগে A চলে যায়। মোট সময় ছিল
A10 দিন
B9 দিন
C12 দিন
D8 দিন
Answer & Solution
Correct answer: A. 10 দিন
B কাজ করে x দিন এবং A কাজ করে x - 3 দিন: x/24 + (x-3)/12 = 1 থেকে পাওয়া যায় x = 10 দিন।
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