alleryএকটি ট্যাঙ্ক এক-চতুর্থাংশ পূর্ণ আছে। একটি পাইপ একটি সম্পূর্ণ ট্যাঙ্ক 12 ঘণ্টায় পূর্ণ করে। বাকি অংশ পূর্ণ হতে সময় লাগে
A9 ঘণ্টা
B10 ঘণ্টা
C8 ঘণ্টা
D3 ঘণ্টা
Answer & Solution
Correct answer: A. 9 ঘণ্টা
তিন-চতুর্থাংশ বাকি থাকে, যা হলো 3/4 x 12 = 9 ঘণ্টা।
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