A tank is filled in 5 hours by three pipes A,B and C The pipe C is twice as fast as B and B is twice as fast as A How much time will pipe A alone take to fill the tank?

A 20 hours
B 25 hours
C 35 hours
D None of these

Correct Answer: 35 hours

Suppose pipe A alone takes x hours to fill the tank. Then, pipes B and C will take x/2 and x/4 hours respectively to fill the tank. ∴1/x + 2/x + 4/x = 1/5 ⇒7/x = 1/5 ⇒x = 35hours
Bissoy MCQ
#গণিত #নল ও চৌবাচ্চা (Pipes and cistern) #Combined Bank (সমন্বিত ব্যাংক) #সমন্বিত ৬ (ব্যাংক) ও ২ টি আর্থিক প্রতিষ্ঠান - সিনিয়র অফিসার ১০.০৬.২০১৯

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