3 pums, working 8 hours a day, can empty a tank in 2 days. How many hours a day must 4 pumps work to empty the tank in 1 day?

A 9
B 10
C 11
D 12

Correct Answer: 12

       3 Pumps empty a tank in 2 days = by working 8 hours       3 Pumps empty a tank in 1 days = by working (8*2) hours       1 Pumps empty a tank in 1 days = by working (8*2*3) hoursSo, 4 Pumps empty a tank in 1 days = by working (8*2*3)/4 hours                                                                                      =  12 hours (Ans)
Bissoy MCQ
#গণিত #নল ও চৌবাচ্চা (Pipes and cistern) #Uttara Bank Ltd #উত্তরা ব্যাংক | অ্যাসিস্ট্যান্ট অফিসার | 23-07-2022

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