A pipe fills a tank in P minuties and another pipe fills the tank in Q minutes. A different pipe makes the tank empty in R minutes. If all these three pipe are opened then in how many minutes the tank will be full?

A p+q-qpqr
B pq+pr-pqpqr
C pq+qr-prpqr
D pqrqr+pr-pq

Correct Answer: pqrqr+pr-pq

Bissoy MCQ
#পিএসসি ও অন্যান্য নিয়োগ পরীক্ষা #গণিত #নল ও চৌবাচ্চা (Pipes and cistern) #বাংলাদেশ সেতু কর্তৃপক্ষ (সহকারী সাব-ইঞ্জিনিয়ার) 18-12-2020

Related Questions

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