alleryএকটি পাইপ একটি ট্যাঙ্কের দুই-তৃতীয়াংশ 8 ঘণ্টায় পূর্ণ করে। সম্পূর্ণ ট্যাঙ্কটির জন্য প্রয়োজন
A14 ঘণ্টা
B12 ঘণ্টা
C16 ঘণ্টা
D10 ঘণ্টা
Answer & Solution
Correct answer: B. 12 ঘণ্টা
8 ঘণ্টায় দুই-তৃতীয়াংশ মানে 4 ঘণ্টায় এক-তৃতীয়াংশ, সুতরাং সমগ্রটির জন্য 12 ঘণ্টা।
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