alleryদুটা পাইপে এটা টেংক ক্ৰমে 20 আৰু 30 ঘণ্টাত ভৰ্তি কৰে, আৰু এটা তৃতীয় পাইপে ইয়াক 60 ঘণ্টাত খালী কৰে। আটাইবোৰ খোলা থাকিলে, টেংকটো ভৰ্তি হ'বলৈ সময় লাগিব
A15 ঘণ্টা
B18 ঘণ্টা
C10 ঘণ্টা
D12 ঘণ্টা
Answer & Solution
Correct answer: A. 15 ঘণ্টা
প্ৰকৃত হাৰ প্ৰতি ঘণ্টাত 3/60 + 2/60 - 1/60 = 4/60 = 1/15, গতিকে 15 hours।
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